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
With the onset of May, Riverdale observes a minor temperature ascent, with the average high-temperature adjusting from April's 74.8°F (23.8°C) to a still warm 82.8°F (28.2°C). Despite drastic daily temperature oscillations, Riverdale cools down to an average low-temperature of 57°F (13.9°C) in May.Heat index
May's average heat index is appraised at 82.4°F (28°C). With unrelenting exposure and activity, one might experience exhaustion, leading to potential heat cramps.Heat index specifics point out values are for conditions of shade and a slight breeze. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Humidity
In Riverdale, the average relative humidity in May is 43%.Rainfall
In Riverdale, in May, it is raining for 4 days, with typically 0.51" (13mm) of accumulated precipitation. In Riverdale, California, during the entire year, the rain falls for 58.2 days and collects up to 9.29" (236mm) of precipitation.Daylight
In May, the average length of the day is 14h and 7min.On the first day of May, sunrise is at 6:05 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 8:11 pm PDT.
Sunshine
In May, the average sunshine in Riverdale is 11.6h.UV index
In May, the average daily maximum UV index in Riverdale, California, is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: A daily high UV index of 6 in May leads to these guidelines:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
How hot is May in Riverdale?
What is the average humidity in May in Riverdale?
How much does it rain in Riverdale in May?
What is the average length of the day in May in Riverdale?
When is the sunrise / sunset in May in Riverdale?
How many hours of sunshine does Riverdale have in May?
What is the UV index intensity in May in Riverdale?
Average temperature in May
Riverdale, CA
- Average high temperature in May: 82.8°F
The warmest month (with the highest average high temperature) is July (102.2°F).
The month with the lowest average high temperature is December (57.2°F).
- Average low temperature in May: 57°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is December (43°F).
Average pressure in May
Riverdale, CA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Riverdale, CA
- Average wind speed in May: 6.6mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and November (4.8mph).
Average humidity in May
Riverdale, CA
- Average humidity in May: 43%
The months with the highest relative humidity are January and December (66%).
The month with the lowest relative humidity is July (30%).
Average rainfall in May
Riverdale, CA
- Average rainfall in May: 0.51"
The wettest months (with the highest rainfall) are January, February and March (1.54").
The driest month (with the least rainfall) is August (0.08").
Average rainfall days in May
Riverdale, CA
- Average rainfall days in May: 4 days
The month with the highest number of rainy days is March (9.6 days).
The month with the least rainy days is August (0.8 days).
Average daylight in May /
Average sunshine in May
Riverdale, CA
- Average daylight in May: 14h and 1min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in May: 11h and 4min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in May
Riverdale, CA
- Average sunshine days in May: 26.4 days
The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is February (19.4 days).
Average UV index in May
Riverdale, CA
- Average UV index in May: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in May
Riverdale, CA
- Average cloud cover in May: 15
The months with the most cloud cover are March and December (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in May
Riverdale, 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).
Riverdale, California, USA
Weather forecast for your location
2. Allow the app to use your location
