Weather Almanac: San Mateo, CA 94403

🗓️ Historical norms for December 2025

December avg. precipitation
🌧️ 3.84"
December days below freezing
📉 ≈2.4 days
Average December lows 37°F – 44°F
USDA Zone
10a
Annual extreme lows 30°F to 35°F
Last Spring Frost (36°F)
🌷 Mar 3
First Fall Frost (36°F)
🍂 Nov 18
Mon. December 1  

🌅 7:05 a.m.

H: 55°F – 64°F

L: 36°F – 48°F

🌇 4:51 p.m.

Tue. December 2  

🌅 7:06 a.m.

H: 55°F – 64°F

L: 35°F – 48°F

🌇 4:50 p.m.

Wed. December 3  

🌅 7:07 a.m.

H: 55°F – 64°F

L: 35°F – 48°F

🌇 4:50 p.m.

Thu. December 4 🌕

🌅 7:08 a.m.

H: 55°F – 64°F

L: 35°F – 47°F

🌇 4:50 p.m.

Fri. December 5  

🌅 7:09 a.m.

H: 55°F – 64°F

L: 35°F – 47°F

🌇 4:50 p.m.

Sat. December 6  

🌅 7:10 a.m.

H: 55°F – 63°F

L: 35°F – 47°F

🌇 4:50 p.m.

Sun. December 7  

🌅 7:10 a.m.

H: 54°F – 63°F

L: 35°F – 47°F

🌇 4:50 p.m.

Mon. December 8  

🌅 7:11 a.m.

H: 54°F – 63°F

L: 35°F – 47°F

🌇 4:50 p.m.

Tue. December 9  

🌅 7:12 a.m.

H: 54°F – 63°F

L: 34°F – 47°F

🌇 4:50 p.m.

Wed. December 10  

🌅 7:13 a.m.

H: 54°F – 63°F

L: 34°F – 47°F

🌇 4:51 p.m.

Thu. December 11 🌗

🌅 7:14 a.m.

H: 54°F – 63°F

L: 34°F – 47°F

🌇 4:51 p.m.

Fri. December 12  

🌅 7:14 a.m.

H: 54°F – 63°F

L: 34°F – 47°F

🌇 4:51 p.m.

Sat. December 13  

🌅 7:15 a.m.

H: 54°F – 63°F

L: 34°F – 47°F

🌇 4:51 p.m.

Sun. December 14  

🌅 7:16 a.m.

H: 53°F – 63°F

L: 34°F – 47°F

🌇 4:51 p.m.

Mon. December 15  

🌅 7:16 a.m.

H: 53°F – 63°F

L: 34°F – 47°F

🌇 4:52 p.m.

Tue. December 16  

🌅 7:17 a.m.

H: 53°F – 62°F

L: 34°F – 47°F

🌇 4:52 p.m.

Wed. December 17  

🌅 7:18 a.m.

H: 53°F – 62°F

L: 34°F – 46°F

🌇 4:52 p.m.

Thu. December 18  

🌅 7:18 a.m.

H: 53°F – 62°F

L: 34°F – 46°F

🌇 4:53 p.m.

Fri. December 19 🌑

🌅 7:19 a.m.

H: 53°F – 62°F

L: 33°F – 46°F

🌇 4:53 p.m.

Sat. December 20  

🌅 7:19 a.m.

H: 53°F – 62°F

L: 33°F – 46°F

🌇 4:54 p.m.

Sun. December 21 Winter Solstice  

🌅 7:20 a.m.

H: 53°F – 62°F

L: 33°F – 46°F

🌇 4:54 p.m.

Mon. December 22  

🌅 7:20 a.m.

H: 53°F – 62°F

L: 33°F – 46°F

🌇 4:55 p.m.

Tue. December 23  

🌅 7:21 a.m.

H: 53°F – 62°F

L: 33°F – 46°F

🌇 4:55 p.m.

Wed. December 24 Christmas Eve  

🌅 7:21 a.m.

H: 53°F – 62°F

L: 33°F – 46°F

🌇 4:56 p.m.

Thu. December 25 Christmas Day  

🌅 7:22 a.m.

H: 53°F – 62°F

L: 33°F – 46°F

🌇 4:56 p.m.

Fri. December 26  

🌅 7:22 a.m.

H: 52°F – 62°F

L: 33°F – 46°F

🌇 4:57 p.m.

Sat. December 27 🌓

🌅 7:22 a.m.

H: 52°F – 62°F

L: 33°F – 46°F

🌇 4:58 p.m.

Sun. December 28  

🌅 7:23 a.m.

H: 52°F – 62°F

L: 33°F – 46°F

🌇 4:58 p.m.

Mon. December 29  

🌅 7:23 a.m.

H: 52°F – 62°F

L: 33°F – 46°F

🌇 4:59 p.m.

Tue. December 30  

🌅 7:23 a.m.

H: 52°F – 62°F

L: 33°F – 46°F

🌇 5:00 p.m.

Wed. December 31  

🌅 7:23 a.m.

H: 52°F – 62°F

L: 33°F – 46°F

🌇 5:01 p.m.


Temperature climatic data from weather station: REDWOOD CITY (USC00047339)

Precipitation climatic data from weather station: REDWOOD CITY (USC00047339)

Agricultural climatic data from weather station: REDWOOD CITY (USC00047339)