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 commencement of May records an average high-temperature of a still moderately hot 75.7°F (24.3°C), barely varying from April's 73.6°F (23.1°C). An average low-temperature of 55.9°F (13.3°C) is common during the nights of May.Humidity
The average relative humidity in May is 58%.Rainfall
In Rowland Heights, California, in May, it is raining for 3.3 days, with typically 0.16" (4mm) of accumulated precipitation. In Rowland Heights, during the entire year, the rain falls for 43.8 days and collects up to 7.01" (178mm) of precipitation.Daylight
In May, the average length of the day in Rowland Heights, California, is 13h and 56min.On the first day of the month, sunrise is at 6:01 am and sunset at 7:35 pm. On the last day of May, sunrise is at 5:41 am and sunset at 7:57 pm PDT.
Sunshine
The average sunshine in May is 11.2h.UV index
The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 5 during May translates into the following directions:
Be vigilant - Suggestions to stave off sun damage are provided. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the average humidity in May?
How many days does it rain in May in Rowland Heights?
How many hours of daylight does Rowland Heights have in May?
When are sunrise and sunset in May?
How many hours of sunshine does Rowland Heights have in May?
What is the UV index reading in May?
Average temperature in May
Rowland Heights, CA
- Average high temperature in May: 75.7°F
The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is December (64.9°F).
- Average low temperature in May: 55.9°F
The month with the highest average low temperature is August (66.2°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).
Average pressure in May
Rowland Heights, 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
Rowland Heights, CA
- Average wind speed in May: 5.7mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.6mph).
Average humidity in May
Rowland Heights, CA
- Average humidity in May: 58%
The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (46%).
Average rainfall in May
Rowland Heights, CA
- Average rainfall in May: 0.16"
The wettest month (with the highest rainfall) is December (1.61").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in May
Rowland Heights, CA
- Average rainfall days in May: 3.3 days
The month with the highest number of rainy days is March (6.6 days).
The month with the least rainy days is June (1.1 days).
Average daylight in May /
Average sunshine in May
Rowland Heights, CA
- Average daylight in May: 13h and 5min
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 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 48min).
Average sunshine days in May
Rowland Heights, CA
- Average sunshine days in May: 26.4 days
The month with the most sunshine days is August (28.2 days).
The month with the least sunshine days is February (21.6 days).
Average UV index in May
Rowland Heights, CA
- Average UV index in May: 5
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in May
Rowland Heights, CA
- Average cloud cover in May: 16
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
Rowland Heights, 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).
Rowland Heights, California, USA
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