May weather forecastMountain View, CA

A street in Mountain View Town, California, with neon-lit building, trees, and parked cars

May

Weather in May

The last month of the spring, May, is a pleasant month in Mountain View, California, with an average temperature varying between 69.3°F (20.7°C) and 49.5°F (9.7°C).

Temperature

The arrival of May records an average high-temperature of an agreeable 69.3°F (20.7°C), closely related to the 66.2°F (19°C) observed in April. Throughout May, Mountain View's nights cool down to an average of 49.5°F (9.7°C).

Humidity

In Mountain View, the average relative humidity in May is 68%.

Rainfall

In Mountain View, during May, the rain falls for 3.6 days and regularly aggregates up to 0.2" (5mm) of precipitation. Throughout the year, there are 53.1 rainfall days, and 4.41" (112mm) of precipitation is accumulated.

Daylight

The average length of the day in May is 14h and 12min.
On the first day of the month, sunrise is at 6:12 am and sunset at 7:58 pm. On the last day of May, sunrise is at 5:49 am and sunset at 8:23 pm PDT.

Sunshine

In May, the average sunshine is 10.9h.

UV index

In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 5 during May translates into the following directions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.

Updated: Jun 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in May, in Mountain View, is 69.3°F (20.7°C), while the low-temperature averages to 49.5°F (9.7°C).

In May, the average relative humidity is 68%.

In May, in Mountain View, the rain falls for 3.6 days. Throughout May, 0.2" (5mm) of precipitation is accumulated.

In May, the average day length is 14h and 12min.

In May, on the first day of the month, sunrise is at 6:12 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:23 pm PDT.

In May, the average sunshine duration is 10.9h.

In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

66.2°F

69.3°F

76.6°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6.8mph

6.4mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

23.2

25.8

27.8

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Mountain View, CA

Average high temperature in May: 69.3°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (56.5°F).

Average low temperature in May: 49.5°F

The month with the highest average low temperature is August (56.8°F).
The coldest month (with the lowest average low temperature) is December (44.1°F).

Average pressure in May
Mountain View, CA

Average pressure in May: 29.98"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June and September (29.92"Hg).

Average wind speed in May
Mountain View, CA

Average wind speed in May: 6.2mph

The windiest months (with the highest average wind speed) are April and May (6.2mph).
The calmest months (with the lowest average wind speed) are August, September, October and November (4.7mph).

Average humidity in May
Mountain View, CA

Average humidity in May: 68%

The month with the highest relative humidity is March (73%).
The months with the lowest relative humidity are July, September and October (63%).

Average rainfall in May
Mountain View, CA

Average rainfall in May: 0.2"

The wettest months (with the highest rainfall) are February, March and December (0.83").
The driest months (with the least rainfall) are June, July and August (0.04").

Average rainfall days in May
Mountain View, CA

Average rainfall days in May: 3.6 days

The month with the highest number of rainy days is March (10 days).
The month with the least rainy days is August (0.4 days).

Average daylight in May /
Average sunshine in May
Mountain View, CA

Average daylight in May: 14h and 12min

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 May: 10h and 54min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

Average sunshine days in May
Mountain View, CA

Average sunshine days in May: 25.8 days

The months with the most sunshine days are July and August (29.8 days).
The month with the least sunshine days is March (19.4 days).

Average UV index in May
Mountain View, CA

Average UV index in May: 5

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are February, November and December (UV index 3).

Average cloud cover in May
Mountain View, CA

Average cloud cover in May: 22

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 7).

Average visibility in May
Mountain View, CA

Average visibility in May: 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).