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
Johnstown's average high-temperature in May is a still pleasant 72.5°F (22.5°C), indicating a subtle variation from April. An average low-temperature of 52.7°F (11.5°C) is expected during May.Humidity
May is the most humid month in Johnstown, with an average relative humidity of 65%.Rainfall
In Johnstown, during May, the rain falls for 3 days and regularly aggregates up to 0.2" (5mm) of precipitation. Throughout the year, there are 49.6 rainfall days, and 5.16" (131mm) 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 7:29 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 7:50 pm PDT.
Sunshine
In Johnstown, California, the average sunshine in May is 11.4h.UV index
The average daily maximum UV index in May in Johnstown is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In May, the maximum UV index of 5 translates into these guidelines:
Ensure safety - Recommendations to avert sunburn are presented. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
What is the usual temperature for Johnstown in May?
What is the most humid month in Johnstown?
What is the average humidity in May in Johnstown?
How many days does it rain in May in Johnstown?
What is the average length of the day in May in Johnstown?
When are sunrise and sunset in May in Johnstown?
How many hours of sunshine does Johnstown have in May?
What is the UV index intensity in May in Johnstown?
Average temperature in May
Johnstown, CA
- Average high temperature in May: 72.5°F
The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is December (63.7°F).
- Average low temperature in May: 52.7°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in May
Johnstown, CA
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in May
Johnstown, CA
- Average wind speed in May: 5.3mph
The windiest months (with the highest average wind speed) are April and May (5.3mph).
The calmest months (with the lowest average wind speed) are August, September and October (4.2mph).
Average humidity in May
Johnstown, CA
- Average humidity in May: 65%
The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is November (52%).
Average rainfall in May
Johnstown, CA
- Average rainfall in May: 0.2"
The wettest month (with the highest rainfall) is February (1.06").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in May
Johnstown, CA
- Average rainfall days in May: 3 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (1.4 days).
Average daylight in May /
Average sunshine in May
Johnstown, 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 2min
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 42min).
Average sunshine days in May
Johnstown, CA
- Average sunshine days in May: 26.9 days
The month with the most sunshine days is June (28 days).
The month with the least sunshine days is July (20.7 days).
Average UV index in May
Johnstown, CA
- Average UV index in May: 5
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in May
Johnstown, CA
- Average cloud cover in May: 17
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 6).
Average visibility in May
Johnstown, 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).
Johnstown, California, USA
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