901
FPUS56 KSTO 210722
ZFPSTO

Interior Northern California Zone Forecasts for California
National Weather Service Sacramento CA
1222 AM PDT Thu Aug 21 2025

Spot temperatures and probabilities of measurable precipitation
are for today, tonight, and Friday.


CAZ013-212300-
Shasta Lake Area / Northern Shasta County-
Including the city of Shasta Dam
1222 AM PDT Thu Aug 21 2025

...HEAT ADVISORY IN EFFECT FROM 11 AM FRIDAY TO 11 PM PDT
SATURDAY...

.TODAY...Sunny, warmer. Highs 88 to 103 higher elevations...98 to
108 lower elevations. Prevailing north winds up to 10 mph
shifting to the southeast in the afternoon.
.TONIGHT...Clear. Lows 57 to 72 higher elevations...65 to
75 lower elevations. Light winds becoming north up to 10 mph
after midnight.
.FRIDAY...Mostly sunny. Highs 88 to 103 higher elevations...98 to
106 lower elevations. Prevailing north winds up to 10 mph
shifting to the south in the afternoon.
.FRIDAY NIGHT...Mostly clear. Lows 59 to 74 higher elevations...
68 to 76 lower elevations. Light winds.
.SATURDAY...Mostly sunny. Highs 87 to 102 higher elevations...
97 to 107 lower elevations. Light winds becoming south up to
10 mph in the afternoon.
.SATURDAY NIGHT...Mostly clear. Lows 61 to 76.
.SUNDAY...Mostly sunny. Highs 88 to 103.
.SUNDAY NIGHT...Mostly clear. Lows 60 to 75.
.MONDAY...Sunny. Highs 87 to 102.
.MONDAY NIGHT AND TUESDAY...Mostly clear. A slight chance of rain
showers. Lows 59 to 74. Highs 86 to 101.
.TUESDAY NIGHT...Mostly cloudy with a chance of rain showers.
Lows 57 to 72.
.WEDNESDAY...Partly cloudy with a slight chance of rain showers.
Highs 79 to 94.

&&
                        TEMPERATURE  /  PRECIPITATION
SHASTA DAM            106   73  104  /   0    0    0


$$
=

CAZ014-212300-
Burney Basin / Eastern Shasta County-
Including the city of Burney
1222 AM PDT Thu Aug 21 2025

.TODAY...Sunny, warmer. Highs 88 to 99. Light winds becoming
northwest up to 10 mph in the afternoon.
.TONIGHT...Mostly clear. Lows 51 to 63. Light winds.
.FRIDAY...Mostly sunny. Highs 88 to 99. Light winds becoming west
up to 10 mph in the afternoon.
.FRIDAY NIGHT...Mostly clear. Lows 54 to 66. Prevailing west
winds up to 10 mph in the evening becoming light.
.SATURDAY...Mostly sunny. Highs 87 to 99. Light winds becoming
west up to 10 mph in the afternoon.
.SATURDAY NIGHT...Partly cloudy. Lows 55 to 67.
.SUNDAY...Mostly sunny. Highs 85 to 96.
.SUNDAY NIGHT...Mostly clear. Cooler. Lows 51 to 65.
.MONDAY...Partly cloudy with a slight chance of rain showers.
Highs 83 to 96.
.MONDAY NIGHT...Partly cloudy with a slight chance of rain
showers. Lows 50 to 64.
.TUESDAY...Partly cloudy with a slight chance of showers and
thunderstorms. Highs 79 to 92.
.TUESDAY NIGHT...Mostly cloudy with a chance of rain showers.
Lows 50 to 64.
.WEDNESDAY...Partly cloudy with a chance of rain showers. Highs
74 to 87.

&&
                        TEMPERATURE  /  PRECIPITATION
BURNEY                 96   54   96  /   0    0    0


$$
=

CAZ015-212300-
Northern Sacramento Valley-
Including the cities of Redding and Red Bluff
1222 AM PDT Thu Aug 21 2025

...HEAT ADVISORY IN EFFECT FROM 11 AM FRIDAY TO 11 PM PDT
SATURDAY...

.TODAY...Sunny. Highs 101 to 107. Northwest winds up to 10 mph.
.TONIGHT...Clear. Lows 67 to 75. Light winds.
.FRIDAY...Mostly sunny. Highs 100 to 106. Light winds becoming
south up to 10 mph in the afternoon.
.FRIDAY NIGHT...Mostly clear. Lows 69 to 77. South winds up to
10 mph in the evening becoming light.
.SATURDAY...Mostly sunny. Highs 100 to 106. Light winds becoming
south up to 10 mph in the afternoon.
.SATURDAY NIGHT...Mostly clear. Lows 70 to 76.
.SUNDAY...Mostly sunny. Highs 99 to 105.
.SUNDAY NIGHT...Mostly clear. Lows 69 to 75.
.MONDAY...Sunny. Highs 98 to 104.
.MONDAY NIGHT AND TUESDAY...Mostly clear. Lows 68 to 74. Highs
95 to 104.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. A slight chance of
rain showers. Lows 67 to 73. Highs 91 to 101.

&&
                        TEMPERATURE  /  PRECIPITATION
REDDING               106   67  105  /   0    0    0
RED BLUFF             105   69  104  /   0    0    0


$$
=

CAZ016-212300-
Central Sacramento Valley-
Including the cities of Chico, Oroville, and Marysville/Yuba City
1222 AM PDT Thu Aug 21 2025

...HEAT ADVISORY IN EFFECT FROM 11 AM FRIDAY TO 11 PM PDT
SATURDAY...

.TODAY...Sunny. Highs around 101. Light winds becoming west up to
10 mph in the afternoon.
.TONIGHT...Mostly clear. Lows 63 to 73. Light winds.
.FRIDAY...Mostly sunny. Highs around 100. Light winds becoming
south up to 10 mph in the afternoon.
.FRIDAY NIGHT...Mostly clear. Lows 66 to 74. Southeast winds up
to 10 mph.
.SATURDAY...Mostly sunny. Highs around 99. Light winds becoming
south up to 10 mph in the afternoon.
.SATURDAY NIGHT...Mostly clear. Lows 65 to 73.
.SUNDAY...Mostly sunny. Highs around 99.
.SUNDAY NIGHT...Mostly clear. Lows 64 to 72.
.MONDAY AND MONDAY NIGHT...Clear. Highs around 97. Lows 63 to 72.
.TUESDAY...Mostly sunny. Highs around 95.
.TUESDAY NIGHT...Partly cloudy with a slight chance of rain
showers. Lows 63 to 69.
.WEDNESDAY...Mostly sunny. Highs around 91.

&&
                        TEMPERATURE  /  PRECIPITATION
CHICO                 102   73  102  /   0    0    0
OROVILLE              102   70  102  /   0    0    0
MARYSVILLE/YUBA CITY  102   67  102  /   0    0    0


$$
=

CAZ017-212300-
Southern Sacramento Valley-
Including the city of Sacramento
1222 AM PDT Thu Aug 21 2025

...HEAT ADVISORY IN EFFECT FROM 11 AM FRIDAY TO 11 PM PDT
SATURDAY...

.TODAY...Mostly sunny. Highs 98 to 104. West winds up to 10 mph.
.TONIGHT...Partly cloudy. Lows 61 to 71. South winds up to
10 mph.
.FRIDAY...Mostly sunny. Highs 98 to 104. Southwest winds up to
10 mph.
.FRIDAY NIGHT...Mostly clear. Lows 62 to 72. Southwest winds up
to 10 mph.
.SATURDAY...Mostly sunny. Highs 95 to 103. Southwest winds up to
10 mph.
.SATURDAY NIGHT...Mostly clear. Lows 61 to 71.
.SUNDAY...Mostly sunny. Highs 93 to 101.
.SUNDAY NIGHT...Mostly clear. Lows 59 to 69.
.MONDAY...Sunny. Highs 92 to 100.
.MONDAY NIGHT...Mostly clear. Lows 58 to 68.
.TUESDAY...Partly cloudy with a slight chance of rain showers.
Highs 89 to 97.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Lows 58 to 66. Highs
87 to 97.

&&
                        TEMPERATURE  /  PRECIPITATION
SACRAMENTO            103   67  103  /   0    0    0
SAC EXEC AIRPORT      103   64  101  /   0    0    0


$$
=

CAZ018-212300-
Carquinez Strait and Delta-
Including the city of Fairfield/Suisun
1222 AM PDT Thu Aug 21 2025

...HEAT ADVISORY IN EFFECT FROM 11 AM FRIDAY TO 11 PM PDT
SATURDAY...

.TODAY...Mostly sunny. Highs 94 to 100. West winds up to 10 mph
with gusts to around 20 mph.
.TONIGHT...Partly cloudy. Lows 58 to 66. Southwest winds 10 to
15 mph.
.FRIDAY...Mostly sunny. Highs 91 to 97. West winds around 10 mph
with gusts to around 20 mph.
.FRIDAY NIGHT...Mostly clear. Lows 59 to 67. Southwest winds
10 to 15 mph.
.SATURDAY...Mostly sunny. Near the bay, mostly cloudy in the
morning then clearing. Highs 88 to 94. West winds 10 to 15 mph
with gusts to around 25 mph.
.SATURDAY NIGHT...Mostly clear. Lows 58 to 66.
.SUNDAY...Mostly sunny. Highs 87 to 93.
.SUNDAY NIGHT...Mostly clear. Lows 58 to 64.
.MONDAY...Sunny. Highs 84 to 90.
.MONDAY NIGHT THROUGH WEDNESDAY...Mostly clear. Lows 57 to 64.
Highs 83 to 89.

&&
                        TEMPERATURE  /  PRECIPITATION
FAIRFIELD/SUISUN      103   62   99  /   0    0    0


$$
=

CAZ019-212300-
Northern San Joaquin Valley-
Including the cities of Stockton and Modesto
1222 AM PDT Thu Aug 21 2025

...HEAT ADVISORY IN EFFECT FROM 11 AM FRIDAY TO 11 PM PDT
SATURDAY...

.TODAY...Mostly sunny in the morning then becoming partly cloudy.
Highs 96 to 104. Northwest winds up to 10 mph with gusts to
around 20 mph.
.TONIGHT...Mostly clear. Lows 64 to 74. Northwest winds up to
10 mph. Gusts up to 20 mph in the evening.
.FRIDAY...Sunny. Highs 98 to 104. Northwest winds up to 10 mph.
.FRIDAY NIGHT...Mostly clear. Lows 65 to 75. Northwest winds up
to 10 mph.
.SATURDAY...Mostly sunny. Highs 95 to 101. Northwest winds up to
10 mph.
.SATURDAY NIGHT...Mostly clear. Lows 64 to 74.
.SUNDAY...Mostly sunny. Highs 94 to 100.
.SUNDAY NIGHT...Mostly clear. Lows 61 to 71.
.MONDAY...Partly cloudy with a slight chance of rain showers.
Highs 92 to 98.
.MONDAY NIGHT...Mostly clear. Lows 60 to 70.
.TUESDAY...Partly cloudy with a slight chance of rain showers.
Highs 90 to 96.
.TUESDAY NIGHT AND WEDNESDAY...Mostly clear. Lows 60 to 68. Highs
87 to 96.

&&
                        TEMPERATURE  /  PRECIPITATION
STOCKTON              104   65  103  /   0    0    0
MODESTO               101   70  103  /   0    0    0


$$
=

CAZ063-212300-
Mountains Southwestern Shasta County to Western Colusa County-
Including the city of Alder Springs
1222 AM PDT Thu Aug 21 2025

...HEAT ADVISORY IN EFFECT FROM 11 AM FRIDAY TO 11 PM PDT
SATURDAY...

.TODAY...Sunny, warmer. Highs 81 to 96 higher elevations...98 to
104 lower elevations. Prevailing northwest winds up to 10 mph
shifting to the east in the afternoon.
.TONIGHT...Clear. Lows 63 to 75 higher elevations...71 to
79 lower elevations. Prevailing west winds up to 10 mph.
.FRIDAY...Mostly sunny. Highs 82 to 97 higher elevations...98 to
103 lower elevations. Prevailing northwest winds up to 10 mph
shifting to the east in the afternoon.
.FRIDAY NIGHT...Mostly clear. Lows 64 to 76 higher elevations...
73 to 79 lower elevations. Prevailing south winds up to 10 mph
shifting to the west after midnight.
.SATURDAY...Mostly sunny. Highs 82 to 97 higher elevations...
97 to 103 lower elevations. Prevailing northwest winds up to
10 mph shifting to the southeast in the afternoon.
.SATURDAY NIGHT...Mostly clear. Lows 65 to 79.
.SUNDAY...Mostly sunny. Highs 83 to 98.
.SUNDAY NIGHT...Mostly clear. Lows 64 to 78.
.MONDAY...Sunny. Highs 83 to 98.
.MONDAY NIGHT...Mostly clear. Lows 63 to 78.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with a slight chance
of rain showers. Highs 77 to 92. Lows 62 to 77.

&&
                        TEMPERATURE  /  PRECIPITATION
ALDER SPRINGS          89   69   89  /   0    0    0


$$
=

CAZ066-212300-
Northeast Foothills/Sacramento Valley-
Including the city of Paradise
1222 AM PDT Thu Aug 21 2025

.TODAY...Sunny, warmer. Highs 91 to 105. Prevailing northeast
winds up to 10 mph in the morning becoming light.
.TONIGHT...Mostly clear. Lows 68 to 78. Light winds becoming east
up to 10 mph after midnight.
.FRIDAY...Mostly sunny. Highs 91 to 103. Prevailing east winds up
to 10 mph in the morning becoming light.
.FRIDAY NIGHT...Mostly clear. Lows 70 to 80. Prevailing south
winds up to 10 mph shifting to the east after midnight.
.SATURDAY...Mostly sunny. Highs 91 to 103. Light winds becoming
southwest up to 10 mph in the afternoon.
.SATURDAY NIGHT...Mostly clear. Lows 68 to 78.
.SUNDAY...Mostly sunny. Highs 89 to 103.
.SUNDAY NIGHT...Mostly clear. Lows 68 to 76.
.MONDAY...Sunny. Highs 88 to 102.
.MONDAY NIGHT THROUGH TUESDAY NIGHT...Partly cloudy with a slight
chance of rain showers. Lows 65 to 75. Highs 86 to 101.
.WEDNESDAY...Partly cloudy with a slight chance of rain showers.
Highs 81 to 93.

&&
                        TEMPERATURE  /  PRECIPITATION
PARADISE               96   76   96  /   0    0    0


$$
=

CAZ067-212300-
Motherlode-
Including the cities of Grass Valley and Jackson
1222 AM PDT Thu Aug 21 2025

.TODAY...Mostly sunny. Highs 91 to 101. Light winds becoming west
up to 10 mph in the afternoon.
.TONIGHT...Mostly clear. Lows 67 to 77. Light winds.
.FRIDAY...Sunny. Highs 94 to 104. Light winds becoming southwest
up to 10 mph in the afternoon.
.FRIDAY NIGHT...Mostly clear. Lows 68 to 78. Light winds.
.SATURDAY...Mostly sunny in the morning then becoming partly
cloudy. Highs 92 to 100. Light winds becoming southwest up to
10 mph in the afternoon.
.SATURDAY NIGHT...Mostly clear. Lows 67 to 77.
.SUNDAY...Partly cloudy with a slight chance of rain showers.
Highs 92 to 100.
.SUNDAY NIGHT...Mostly clear. Lows 65 to 75.
.MONDAY THROUGH TUESDAY NIGHT...Partly cloudy with a slight
chance of rain showers. Highs 86 to 99. Lows 62 to 75.
.WEDNESDAY...Partly cloudy with a slight chance of rain showers.
Highs 83 to 93.

&&
                        TEMPERATURE  /  PRECIPITATION
GRASS VALLEY           94   69   96  /   0    0    0
JACKSON                98   71   99  /   0    0    0


$$
=

CAZ068-212300-
Western Plumas County/Lassen Park-
Including the cities of Chester and Quincy
1222 AM PDT Thu Aug 21 2025

.TODAY...Sunny, warmer. Highs 77 to 92 higher elevations...83 to
98 lower elevations. Prevailing east winds up to 10 mph shifting
to the southwest in the afternoon.
.TONIGHT...Mostly clear. Lows 56 to 71. Light winds.
.FRIDAY...Mostly sunny. Highs 78 to 93 higher elevations...84 to
99 lower elevations. Light winds becoming southwest up to 10 mph
in the afternoon.
.FRIDAY NIGHT...Mostly clear. Lows 59 to 74. Prevailing southwest
winds up to 10 mph in the evening becoming light.
.SATURDAY...Mostly sunny. Highs 77 to 92 higher elevations...
83 to 98 lower elevations. Light winds becoming southwest up to
10 mph in the afternoon.
.SATURDAY NIGHT...Partly cloudy. Lows 59 to 74.
.SUNDAY...Partly cloudy with a slight chance of rain showers.
Highs 79 to 94.
.SUNDAY NIGHT...Mostly clear. Lows 57 to 72.
.MONDAY AND MONDAY NIGHT...Mostly clear. A slight chance of rain
showers. Highs 78 to 93. Lows 56 to 71.
.TUESDAY...Partly cloudy with a chance of rain showers and a
slight chance of thunderstorms. Highs 74 to 89.
.TUESDAY NIGHT...Partly cloudy with a chance of rain showers.
Lows 53 to 68.
.WEDNESDAY...Partly cloudy with a slight chance of rain showers.
Highs 70 to 85.

&&
                        TEMPERATURE  /  PRECIPITATION
QUINCY                100   52  101  /   0    0    0
CHESTER                94   54   95  /   0    0    0


$$
=

CAZ069-212300-
West Slope Northern Sierra Nevada-
Including the city of Blue Canyon
1222 AM PDT Thu Aug 21 2025

.TODAY...Mostly sunny in the morning then becoming partly cloudy.
Warmer. Highs 75 to 90 higher elevations...88 to 98 lower
elevations. Prevailing east winds up to 10 mph shifting to the
southwest in the afternoon.
.TONIGHT...Mostly clear. Lows 53 to 68 higher elevations...63 to
77 lower elevations. Light winds becoming east up to 10 mph after
midnight.
.FRIDAY...Mostly sunny. Highs 76 to 91 higher elevations...89 to
101 lower elevations. Prevailing east winds up to 10 mph shifting
to the southwest in the afternoon.
.FRIDAY NIGHT...Mostly clear. Lows 55 to 70 higher elevations...
65 to 79 lower elevations. Prevailing west winds up to 10 mph
shifting to the east after midnight.
.SATURDAY...Mostly sunny in the morning, then mostly cloudy with
a chance of rain showers in the afternoon. Highs 74 to 89 higher
elevations...88 to 98 lower elevations. Prevailing east winds up
to 10 mph shifting to the southwest in the afternoon.
.SATURDAY NIGHT...Partly cloudy with a slight chance of rain
showers. Lows 57 to 72.
.SUNDAY...Partly cloudy with a slight chance of showers and
thunderstorms. Highs 77 to 92.
.SUNDAY NIGHT...Partly cloudy with a slight chance of rain
showers. Lows 56 to 71.
.MONDAY...Partly cloudy with a chance of rain showers and a
slight chance of thunderstorms. Highs 75 to 90.
.MONDAY NIGHT...Partly cloudy with a chance of rain showers. Lows
54 to 69.
.TUESDAY...Mostly cloudy with a chance of rain showers and a
slight chance of thunderstorms. Highs 71 to 86.
.TUESDAY NIGHT AND WEDNESDAY...Partly cloudy with a slight chance
of rain showers. Lows 51 to 66. Highs 70 to 85.

&&
                        TEMPERATURE  /  PRECIPITATION
BLUE CANYON            87   70   88  /   0    0    0


$$
=