Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The transition from April to May brings an average high-temperature of a still pleasant 71.6°F (22°C), barely different from April's 70°F (21.1°C). During the month of May, an average low-temperature of 54°F (12.2°C) is recorded.Humidity
May is the most humid month, with an average relative humidity of 66%.Rainfall
In Bostonia, during May, the rain falls for 4.8 days and regularly aggregates up to 0.39" (10mm) of precipitation. Throughout the year, there are 56.1 rainfall days, and 8.27" (210mm) of precipitation is accumulated.Daylight
The average length of the day in May is 13h and 52min.On the first day of May, sunrise is at 5:59 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 7:50 pm PDT.
Sunshine
In Bostonia, the average sunshine in May is 11.1h.UV index
The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In May, the maximum UV index of 5 translates into these guidelines:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the most humid month?
What is the average humidity in May?
How much does it rain in May?
How many hours of daylight does Bostonia have in May?
When are sunrise and sunset in May?
How many hours of sunshine does Bostonia have in May?
What is the UV index intensity in May?
Average temperature in May
Bostonia, CA
- Average high temperature in May: 71.6°F
The warmest month (with the highest average high temperature) is August (83.8°F).
The month with the lowest average high temperature is December (63.7°F).
- Average low temperature in May: 54°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (47.8°F).
Average pressure in May
Bostonia, CA
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.87"Hg).
Average wind speed in May
Bostonia, CA
- Average wind speed in May: 5.4mph
The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest month (with the lowest average wind speed) is October (4.3mph).
Average humidity in May
Bostonia, CA
- Average humidity in May: 66%
The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is November (53%).
Average rainfall in May
Bostonia, CA
- Average rainfall in May: 0.39"
The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in May
Bostonia, CA
- Average rainfall days in May: 4.8 days
The month with the highest number of rainy days is March (7.7 days).
The month with the least rainy days is June (1.4 days).
Average daylight in May /
Average sunshine in May
Bostonia, CA
- Average daylight in May: 13h and 5min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in May: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in May
Bostonia, CA
- Average sunshine days in May: 24.8 days
The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is February (21.9 days).
Average UV index in May
Bostonia, CA
- Average UV index in May: 5
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in May
Bostonia, CA
- Average cloud cover in May: 19
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in May
Bostonia, 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).
Bostonia, California, USA
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