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 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 arrival of May signals an increase in the average high-temperature, moving from a fresh 53.4°F (11.9°C) in April to a comfortable 63°F (17.2°C). Despite a noticeable differential from daytime highs, Janesville notes an average nighttime low-temperature of 39.7°F (4.3°C) in May.Humidity
In Janesville, the average relative humidity in May is 55%.Rainfall
In May, in Janesville, the rain falls for 12.2 days. Throughout May, 1.38" (35mm) of precipitation is accumulated. In Janesville, during the entire year, the rain falls for 97.2 days and collects up to 13.98" (355mm) of precipitation.Snowfall
Months with snowfall in Janesville, California, are January through June, September through December. In Janesville, California, during May, snow falls for 0.9 days and regularly aggregates up to 0.31" (8mm) of snow. In Janesville, during the entire year, snow falls for 52.5 days and aggregates up to 43.07" (1094mm) of snow.Daylight
In May, the average length of the day is 14h and 26min.On the first day of the month, sunrise is at 6:00 am and sunset at 7:57 pm. On the last day of May, in Janesville, sunrise is at 5:34 am and sunset at 8:25 pm PDT.
Sunshine
The average sunshine in May is 11.3h.UV index
The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 4 in May translates into these instructions:
Make use of precautions - It is urged to ward off sun damage. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures in Janesville?
What is the average humidity in May in Janesville?
How many days does it rain in May in Janesville?
How much does it snow in Janesville in May?
How many hours of daylight does Janesville have in May?
When is the sunrise / sunset in May in Janesville?
How long on average sun shines in May in Janesville?
What is the UV index intensity in May in Janesville?
Average temperature in May
Janesville, CA
- Average high temperature in May: 63°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is December (36.9°F).
- Average low temperature in May: 39.7°F
The month with the highest average low temperature is July (52.7°F).
The coldest month (with the lowest average low temperature) is December (22.6°F).
Average pressure in May
Janesville, CA
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Janesville, CA
- Average wind speed in May: 6.9mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest month (with the lowest average wind speed) is January (5.2mph).
Average humidity in May
Janesville, CA
- Average humidity in May: 55%
The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (35%).
Average rainfall in May
Janesville, CA
- Average rainfall in May: 1.38"
The wettest month (with the highest rainfall) is December (2.28").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in May
Janesville, CA
- Average rainfall days in May: 12.2 days
The month with the highest number of rainy days is March (13.4 days).
The months with the least rainy days are July and August (2.8 days).
Average snowfall in May
Janesville, CA
- Average snowfall in May: 0.31"
The month with the highest snowfall is December (10.16").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Janesville, CA
- Average snowfall days in May: 0.9 days
The month with the highest number of snowfall days is December (11.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Janesville, CA
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in May: 11h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 5h and 48min).
Average sunshine days in May
Janesville, CA
- Average sunshine days in May: 15.9 days
The month with the most sunshine days is August (26.2 days).
The month with the least sunshine days is March (12 days).
Average UV index in May
Janesville, CA
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are February and November (UV index 1).
Average cloud cover in May
Janesville, CA
- Average cloud cover in May: 23
The month with the most cloud cover is December (Cloud cover 38).
The months with the least cloud cover are July and August (Cloud cover 7).
Average visibility in May
Janesville, CA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
Janesville, California, USA
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