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 snowfall 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 beginning of May records an average high-temperature of a moderately hot 74.7°F (23.7°C), marking a negligible difference from April's 71.6°F (22°C). In Irwindale, an average nighttime temperature of 54°F (12.2°C) is expected during May.Humidity
May and June, with an average relative humidity of 57%, are the most humid months in Irwindale, California.Rainfall
In Irwindale, during May, the rain falls for 3.7 days and regularly aggregates up to 0.2" (5mm) of precipitation. Throughout the year, in Irwindale, there are 49.6 rainfall days, and 8.11" (206mm) of precipitation is accumulated.Snowfall
January through November are months without snowfall.Daylight
The average length of the day in May is 13h and 57min.On the first day of May, sunrise is at 6:01 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 7:57 pm PDT.
Sunshine
In Irwindale, California, the average sunshine in May is 11.7h.UV index
In Irwindale, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 5 during May translates into the following directions:
Take precautions - Protection against sunburn is recommended. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Irwindale?
What is the most humid month in Irwindale?
What is the average humidity in May in Irwindale?
How many days does it rain in May in Irwindale?
When it does not snow in Irwindale?
What is the average length of the day in May in Irwindale?
What time are sunrise and sunset in May in Irwindale?
How many hours of sunshine does Irwindale have in May?
What is the UV index intensity in May in Irwindale?
Average temperature in May
Irwindale, CA
- Average high temperature in May: 74.7°F
The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is December (63.1°F).
- Average low temperature in May: 54°F
The month with the highest average low temperature is August (64.9°F).
The coldest months (with the lowest average low temperature) are February and December (47.3°F).
Average pressure in May
Irwindale, CA
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in May
Irwindale, CA
- Average wind speed in May: 5.7mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity in May
Irwindale, CA
- Average humidity in May: 57%
The months with the highest relative humidity are May and June (57%).
The month with the lowest relative humidity is November (46%).
Average rainfall in May
Irwindale, CA
- Average rainfall in May: 0.2"
The wettest month (with the highest rainfall) is February (1.73").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in May
Irwindale, CA
- Average rainfall days in May: 3.7 days
The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.2 days).
Average snowfall days in May
Irwindale, CA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in May /
Average sunshine in May
Irwindale, CA
- Average daylight in May: 14h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in May: 11h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).
Average sunshine days in May
Irwindale, CA
- Average sunshine days in May: 26.2 days
The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21.5 days).
Average UV index in May
Irwindale, 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, March, November and December (UV index 4).
Average cloud cover in May
Irwindale, CA
- Average cloud cover in May: 13
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in May
Irwindale, 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).
Irwindale, California, USA
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