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Weather in San Mateo, California for April 2026

Your guide to San Mateo weather in April - trends and predictions

    Temperatures

  • Until now, April 2026 in San Mateo has been nearly identical to the historical average, with a temperature of 15.9 °F (showing only a slight deviation of 0.2 °F).

  • In general, the average temperature in San Mateo at the beginning of April is 15.9 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 15.7 °F by the end of April.

    • Rain 🌧️

  • With an average of 2 rainy days, San Mateo experiences minimal rainfall in April.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
28
Dry days
Average rainy days
2
Rainy days
Average snowy days
0
Snow days
Average temperatures
15°/9°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
83 %
Avg humidity

San Mateo Weather April

Move between months or click on a day
March
May
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Moderate or heavy rain shower
13°
2
Cloudy
13°
3
Partly cloudy
17°
4
Overcast
21°
5
Overcast
19°
6
Overcast
14°
7
Patchy rain possible
14°
8
Overcast
17°
9
Overcast
18°
10
Overcast
16°
11
Overcast
14°
12
Overcast
14°
13
Overcast
17°
14
Cloudy
16°
15
Overcast
16°
16
Overcast
17°
17
Patchy rain possible
17°
18
Overcast
17°
19
Overcast
17°
20
Overcast
17°
21
Overcast
17°
22
Overcast
15°
23
Overcast
14°
24
Patchy rain possible
14°
25
Patchy rain possible
13°
26
Patchy rain possible
14°
27
Patchy rain possible
13°
28
Overcast
16°
29
Overcast
17°
30
Sunny
23°

Temperatures trend during April in San Mateo

See the weather trend as well as the moving average line

April weather in San Mateo day by day

Click on a date for more information
March May
Date Weather Temperatures Rain UV More
Apr. 1 Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /10° 5.7 mm 2
Apr. 2 Cloudy
Cloudy
 13° /8° 2.8 mm 5
Apr. 3 Partly cloudy
Partly cloudy
 17° /8° 0 mm 6
Apr. 4 Overcast
Overcast
 21° /9° 0 mm 6
Apr. 5 Overcast
Overcast
 19° /10° 0 mm 6
Apr. 6 Overcast
Overcast
 14° /8° 0 mm 3
Apr. 7 Patchy rain possible
Patchy rain possible
 14° /9° 0.2 mm 3
Apr. 8 Overcast
Overcast
 17° /10° 0 mm 4
Apr. 9 Overcast
Overcast
 18° /11° 0 mm 3
Apr. 10 Overcast
Overcast
 16° /10° 0 mm 3
Apr. 11 Overcast
Overcast
 14° /10° 17.2 mm 2
Apr. 12 Overcast
Overcast
 14° /9° 19.1 mm 3
Apr. 13 Overcast
Overcast
 17° /9° 0 mm 6
Apr. 14 Cloudy
Cloudy
 16° /9° 0 mm 5
Apr. 15 Overcast
Overcast
 16° /9° 0 mm 4
Apr. 16 Overcast
Overcast
 17° /9° 0 mm 6
Apr. 17 Patchy rain possible
Patchy rain possible
 17° /9° 0.2 mm 6
Apr. 18 Overcast
Overcast
 17° /9° 0 mm 3
Apr. 19 Overcast
Overcast
 17° /9° 0 mm 4
Apr. 20 Overcast
Overcast
 17° /9° 6.2 mm 5
Apr. 21 Overcast
Overcast
 17° /9° 6 mm 4
Apr. 22 Overcast
Overcast
 15° /9° 1 mm 5
Apr. 23 Overcast
Overcast
 14° /9° 0 mm 6
Apr. 24 Patchy rain possible
Patchy rain possible
 14° /9° 0.1 mm 6
Apr. 25 Patchy rain possible
Patchy rain possible
 13° /9° 0.2 mm 3
Apr. 26 Patchy rain possible
Patchy rain possible
 14° /10° 1.3 mm 4
Apr. 27 Patchy rain possible
Patchy rain possible
 13° /9° 0.5 mm 5
Apr. 28 Overcast
Overcast
 16° /9° 0 mm 7
Apr. 29 Overcast
Overcast
 17° /9° 0 mm 7
Apr. 30 Sunny
Sunny
 23° /10° 0 mm 8.5
Next
Important Notice
Our weather forecast for San Mateo in April is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the San Mateo forecast closer to your planned date for the most up-to-date weather information.
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San Mateo in April - FAQ

What are the expected maximum and minimum temperatures in San Mateo during April?

During April, expect a variety of temperatures with highs around 15° and lows near 9°, suitable for diverse activities and preferences.

How much rainfall should be expected in San Mateo during April?

Expect minimal rainfall in San Mateo during April, with a total of 13.4 mm over approximately 2 days. This minimal precipitation is unlikely to significantly impact plans.

What are the typical wind conditions in San Mateo during April?

The average wind speed in San Mateo during April is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

April rainfall patterns in San Mateo

Explore the daily rainfall trends and prepare for San Mateos April weather 💧
Typically, San Mateo has 2 rainy days in April with a total of 13.4 mm of rainfall.

UV exposure in San Mateo during April

Stay informed about UV levels for safe outdoor activities throughout the month of April ☀️

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Location coordinates Where is San Mateo?

Get accurate weather forecasts for San Mateo, located at latitude 37.563 and longitude -122.326. Stay updated with localized weather information tailored for San Mateo.

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