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 onset of May brings a temperature shift, with the average high-temperature moving from a refreshing 57°F (13.9°C) in April to a pleasant 68°F (20°C). Johnstown's temperature lowers to a mean of 48.7°F (9.3°C) during the nights in May.Humidity
In Johnstown, Pennsylvania, the average relative humidity in May is 80%.Rainfall
May is the month with the most rainfall in Johnstown. Rain falls for 19.8 days and accumulates 2.56" (65mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Johnstown. During 0.4 snowfall days, in May, Johnstown aggregates 0.2" (5mm) of snow. In Johnstown, during the entire year, snow falls for 47.7 days and aggregates up to 18.23" (463mm) of snow.Daylight
In May, the average length of the day is 14h and 26min.On the first day of May, sunrise is at 6:13 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:39 pm EDT.
Sunshine
In Johnstown, Pennsylvania, the average sunshine in May is 8.4h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index in Johnstown. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In May, the maximum UV index of 5 suggests this advice:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Frequently asked questions
What is the average May temperature in Johnstown?
What is the average humidity in May in Johnstown?
What is the wettest month in Johnstown?
How much does it rain in Johnstown in May?
What is the last month it snows in Johnstown?
How many hours of daylight does Johnstown have in May?
When is the sunrise / sunset in May in Johnstown?
How long on average sun shines in May in Johnstown?
When is the highest UV index in Johnstown?
How high is the UV index in May in Johnstown?
Average temperature in May
Johnstown, PA
- Average high temperature in May: 68°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in May: 48.7°F
The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in May
Johnstown, PA
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in May
Johnstown, PA
- Average wind speed in May: 7.2mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in May
Johnstown, PA
- Average humidity in May: 80%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is July (78%).
Average rainfall in May
Johnstown, PA
- Average rainfall in May: 2.56"
The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is November (1.1").
Average rainfall days in May
Johnstown, PA
- Average rainfall days in May: 19.8 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in May
Johnstown, PA
- Average snowfall in May: 0.2"
The month with the highest snowfall is March (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Johnstown, PA
- Average snowfall days in May: 0.4 days
The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Johnstown, PA
- 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: 8h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in May
Johnstown, PA
- Average sunshine days in May: 9 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (9 days).
Average UV index in May
Johnstown, PA
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Johnstown, PA
- Average cloud cover in May: 49
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in May
Johnstown, PA
- Average visibility in May: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Johnstown, Pennsylvania, USA
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