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Weather in San Mateo County, California for June 2026

Your guide to San Mateo County weather in June - trends and predictions

    Official Weather Alert ⚠️

  • Coastal Flood Advisory - See hour by hour.

    • Temperatures

  • So far, June 2026 in San Mateo County is slightly warmer than the historical average by 1.6 °F.

  • The forecast for the upcoming days in San Mateo County predicts a temperature of 21.3 °F, which is slightly above the historical average.

  • In general, the average temperature in San Mateo County at the beginning of June is 19.3 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 20.6 °F by the end of June.

    • Rain 🌧️

  • Precipitation in San Mateo County during June is a rare event, with an average of fewer than 2 rainy days.

    • More

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

Average dry days
30
Dry days
Average rainy days
0
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/11°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
82 %
Avg humidity

San Mateo County Weather June

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

Temperatures trend during June in San Mateo County

See the weather trend as well as the moving average line

June weather in San Mateo County day by day

Click on a date for more information
May July
Date Weather Temperatures Rain UV More
Jun. 1 Overcast
Overcast
 17° /9° 0 mm 8
Jun. 2 Overcast
Overcast
 19° /10° 0 mm 8
Jun. 3 Mist
Mist
 21° /10° 0 mm 9
Jun. 4 Cloudy
Cloudy
 20° /10° 0 mm 8
Jun. 5 Mist
Mist
 21° /10° 0 mm 9
Jun. 6 Overcast
Overcast
 18° /11° 0 mm 8
Jun. 7 Mist
Mist
 19° /10° 0 mm 8
Jun. 8 Mist
Mist
 18° /10° 0 mm 8
Jun. 9 Overcast
Overcast
 18° /13° 0.1 mm 8
Jun. 10 Mist
Mist
 20° /11° 0 mm 8
Jun. 11 Mist
Mist
 23° /13° 0 mm 8
Jun. 12 Mist
Mist
 20° /11° 0 mm 8
Jun. 13 Mist
Mist
 20° /11° 0 mm 8
Jun. 14 Sunny
Sunny
 27° /13° 0 mm 9.5
Jun. 15 Sunny
Sunny
 22° /13° 0 mm 9.7
Jun. 16 Sunny
Sunny
 24° /13° 0 mm 9.8
Jun. 17 Sunny
Sunny
 21° /13° 0 mm 10.2
Jun. 18 Sunny
Sunny
 20° /12° 0.1 mm 10.6
Jun. 19 Cloudy
Cloudy
 18° /12° 0.1 mm 0
Jun. 20 Partly cloudy
Partly cloudy
 18° /12° 0.1 mm 4
Jun. 21 Sunny
Sunny
 21° /10° 0 mm 5
Jun. 22 Sunny
Sunny
 22° /12° 0 mm 5
Jun. 23 Sunny
Sunny
 24° /12° 0 mm 5
Jun. 24 Sunny
Sunny
 23° /12° 0 mm 5
Jun. 25 Sunny
Sunny
 19° /11° 0 mm 4
Jun. 26 Sunny
Sunny
 18° /11° 0 mm 4
Jun. 27 Sunny
Sunny
 21° /11° 0 mm 4
Jun. 28 Partly cloudy
Partly cloudy
 23° /11° 0 mm 6
Jun. 29 Cloudy
Cloudy
 21° /11° 0 mm 6
Jun. 30 Partly cloudy
Partly cloudy
 19° /12° 0 mm 6
Next
Important Notice
Our weather forecast for San Mateo County in June 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 County forecast closer to your planned date for the most up-to-date weather information.
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San Mateo County in June - FAQ

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

Enjoy moderate daytime temperatures of up to 17° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in San Mateo County during June?

Rainfall in San Mateo County during June is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 0 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.

What are the typical wind conditions in San Mateo County during June?

The average wind speed in San Mateo County during June is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

UV exposure in San Mateo County during June

Stay informed about UV levels for safe outdoor activities throughout the month of June ☀️
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Location coordinates Where is San Mateo County?

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

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