🌷 Your Ultimate Garden Calendar!

Weather Almanac: San Mateo, CA 94401

🗓️ Historical norms for January 2026

December February
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
January avg. precipitation
🌧️ 4.19"
January days below freezing
📉 ≈0.0 days
Average January lows 42°F – 47°F
USDA Zone
10a
Annual extreme lows 30°F to 35°F
Last Spring Frost (36°F)
🌷 Jan 28
View full details
First Fall Frost (36°F)
🍂 Dec 15
View full details

Book Recommendations (ads!)

📚 Month-by-Month Gardening California: What to Do Each Month to Have a Beautiful Garden All Year

📚 Pacific Northwest Month-by-Month Gardening: What to Do Each Month to Have a Beautiful Garden All Year

📚 California Gardener's Handbook: Your Complete Guide: Select - Plan - Plant - Maintain - Problem-solve

F: Forecast
H: Normal High Temp
L: Normal Low Temp
Thu. January 1 New Year's Day  

🌅 7:24 a.m.

H: 51°F – 60°F

L: 39°F – 49°F

🌇 5:01 p.m.

Fri. January 2  

🌅 7:24 a.m.

H: 51°F – 60°F

L: 39°F – 49°F

🌇 5:02 p.m.

Sat. January 3 🌕

🌅 7:24 a.m.

H: 51°F – 60°F

L: 39°F – 49°F

🌇 5:03 p.m.

Sun. January 4  

🌅 7:24 a.m.

H: 51°F – 60°F

L: 39°F – 49°F

🌇 5:04 p.m.

Mon. January 5  

🌅 7:24 a.m.

H: 51°F – 60°F

L: 39°F – 49°F

🌇 5:05 p.m.

Tue. January 6 Epiphany  

🌅 7:24 a.m.

H: 51°F – 60°F

L: 39°F – 49°F

🌇 5:06 p.m.

Wed. January 7  

🌅 7:24 a.m.

H: 51°F – 60°F

L: 39°F – 49°F

🌇 5:07 p.m.

Thu. January 8  

🌅 7:24 a.m.

H: 51°F – 60°F

L: 39°F – 49°F

🌇 5:08 p.m.

Fri. January 9  

🌅 7:24 a.m.

H: 51°F – 60°F

L: 39°F – 49°F

🌇 5:09 p.m.

Sat. January 10 🌗

🌅 7:24 a.m.

H: 51°F – 60°F

L: 39°F – 49°F

🌇 5:09 p.m.

Sun. January 11  

🌅 7:23 a.m.

H: 51°F – 60°F

L: 39°F – 49°F

🌇 5:10 p.m.

Mon. January 12  

🌅 7:23 a.m.

H: 52°F – 60°F

L: 39°F – 49°F

🌇 5:11 p.m.

Tue. January 13  

🌅 7:23 a.m.

H: 52°F – 60°F

L: 39°F – 49°F

🌇 5:12 p.m.

Wed. January 14  

🌅 7:23 a.m.

H: 52°F – 60°F

L: 39°F – 49°F

🌇 5:13 p.m.

Thu. January 15  

🌅 7:22 a.m.

H: 52°F – 61°F

L: 39°F – 49°F

🌇 5:14 p.m.

Fri. January 16  

🌅 7:22 a.m.

H: 52°F – 61°F

L: 39°F – 49°F

🌇 5:16 p.m.

Sat. January 17  

🌅 7:22 a.m.

H: 52°F – 61°F

L: 39°F – 49°F

🌇 5:17 p.m.

Sun. January 18 🌑

🌅 7:21 a.m.

H: 52°F – 61°F

L: 40°F – 49°F

🌇 5:18 p.m.

Mon. January 19 Martin Luther King Jr. Day  

🌅 7:21 a.m.

H: 52°F – 61°F

L: 40°F – 49°F

🌇 5:19 p.m.

Tue. January 20  

🌅 7:20 a.m.

H: 52°F – 61°F

L: 40°F – 49°F

🌇 5:20 p.m.

Wed. January 21  

🌅 7:20 a.m.

H: 52°F – 61°F

L: 40°F – 49°F

🌇 5:21 p.m.

Thu. January 22  

🌅 7:19 a.m.

H: 52°F – 61°F

L: 40°F – 49°F

🌇 5:22 p.m.

Fri. January 23  

🌅 7:19 a.m.

H: 52°F – 61°F

L: 40°F – 49°F

🌇 5:23 p.m.

Sat. January 24  

🌅 7:18 a.m.

H: 53°F – 61°F

L: 40°F – 49°F

🌇 5:24 p.m.

Sun. January 25 🌓

🌅 7:17 a.m.

H: 53°F – 62°F

L: 40°F – 49°F

🌇 5:25 p.m.

Mon. January 26  

🌅 7:17 a.m.

H: 53°F – 62°F

L: 40°F – 50°F

🌇 5:26 p.m.

Tue. January 27  

🌅 7:16 a.m.

H: 53°F – 62°F

L: 40°F – 50°F

🌇 5:27 p.m.

Wed. January 28  

🌅 7:15 a.m.

H: 53°F – 62°F

L: 40°F – 50°F

🌇 5:29 p.m.

Thu. January 29  

🌅 7:15 a.m.

H: 53°F – 62°F

L: 40°F – 50°F

🌇 5:30 p.m.

Fri. January 30  

🌅 7:14 a.m.

H: 53°F – 62°F

L: 40°F – 50°F

🌇 5:31 p.m.

Sat. January 31  

🌅 7:13 a.m.

H: 53°F – 62°F

L: 41°F – 50°F

🌇 5:32 p.m.

December February
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.

Temperature climatic data from weather station: SAN FRANCISCO INTL AP (USW00023234)

Precipitation climatic data from weather station: SAN FRANCISCO INTL AP (USW00023234)

Agricultural climatic data from weather station: SAN FRANCISCO INTL AP (USW00023234)