June weather forecastSan Mateo, CA
June
Weather in June
June in San Mateo, California, sees a marked shift towards summer. The superb weather during June is characterized by average highs reaching a comfortable 68.5°F (20.3°C). Coupled with the pleasant temperatures, residents experience the most daylight of the year, optimizing their time in the outdoors. This month, often considered the optimal time for a range of outdoor activities, including picnics and nature walks. Venturing outside during these extended daylight hours provides an extra mood booster and adds a spring to your step.Temperature
San Mateo indicates an average high-temperature of an agreeable 68.5°F (20.3°C) in June, showing minor variation from May's 63.9°F (17.7°C). San Mateo's average low-temperature for the month of June records at a fresh 53.4°F (11.9°C).Humidity
The average relative humidity in June is 73%.Rainfall
In San Mateo, rain does not fall in June through August.Daylight
The month with the longest days in San Mateo is June, with an average of 14h and 42min of daylight.On the first day of June, sunrise is at 5:49 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 8:34 pm PDT.
Sunshine
In June, the average sunshine is 11.6h.UV index
June through September, with an average maximum UV index of 5, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In June, a daily maximum UV index of 5 leads to the following instructions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in June
San Mateo, CA
- Average high temperature in June: 68.5°F
The warmest months (with the highest average high temperature) are August and September (71.2°F).
The month with the lowest average high temperature is December (55.8°F).
- Average low temperature in June: 53.4°F
The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).
Average pressure in June
San Mateo, CA
- Average pressure in June: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in June
San Mateo, CA
- Average wind speed in June: 7.2mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest months (with the lowest average wind speed) are August, September and October (5.9mph).
Average humidity in June
San Mateo, CA
- Average humidity in June: 73%
The months with the highest relative humidity are March and August (76%).
The months with the lowest relative humidity are October and November (70%).
Average rainfall in June
San Mateo, CA
- Average rainfall in June: 0"
The wettest month (with the highest rainfall) is February (0.55").
The driest months (with the least rainfall) are June, July and August (0").
Average rainfall days in June
San Mateo, CA
- Average rainfall days in June: 0.4 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is July (0.3 days).
Average daylight in June /
Average sunshine in June
San Mateo, CA
- Average daylight in June: 14h and 42min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in June: 11h and 36min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in June
San Mateo, CA
- Average sunshine days in June: 29.3 days
The month with the most sunshine days is July (30.4 days).
The month with the least sunshine days is February (23.3 days).
Average UV index in June
San Mateo, CA
- Average UV index in June: 5
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February and December (UV index 3).
Average cloud cover in June
San Mateo, CA
- Average cloud cover in June: 15
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in June
San Mateo, CA
- Average visibility in June: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
