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
As April transitions into May in Lewiston, a subtle temperature shift is observed, with average highs adjusting from a mild 56.1°F (13.4°C) to a still refreshing 65.1°F (18.4°C). Throughout May, Lewiston registers a distinct decrease from daytime highs, reaching an average low of 42.6°F (5.9°C).Humidity
In Lewiston, the average relative humidity in May is 68%.Rainfall
In Lewiston, in May, during 13.6 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. Throughout the year, in Lewiston, there are 142.4 rainfall days, and 14.21" (361mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in Lewiston.Daylight
In May, the average length of the day in Lewiston is 15h and 1min.On the first day of the month, sunrise is at 5:32 am and sunset at 7:57 pm. On the last day of May, sunrise is at 4:59 am and sunset at 8:32 pm PDT.
Sunshine
In Lewiston, the average sunshine in May is 10.6h.UV index
In Lewiston, Idaho, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In May, the average maximum UV index of 4 translates into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Frequently asked questions
What is the temperature in May in Lewiston?
What is the average humidity in May in Lewiston?
How much does it rain in Lewiston in May?
When it does not snow in Lewiston?
Does it snow in Lewiston in May?
What is the average length of the day in May in Lewiston?
When is the sunrise / sunset in May in Lewiston?
How many hours of sunshine does Lewiston have in May?
What is the UV index reading in May in Lewiston?
Average temperature in May
Lewiston, ID
- Average high temperature in May: 65.1°F
The warmest month (with the highest average high temperature) is August (85.3°F).
The month with the lowest average high temperature is December (36.1°F).
- Average low temperature in May: 42.6°F
The month with the highest average low temperature is August (59.2°F).
The coldest month (with the lowest average low temperature) is December (24.4°F).
Average pressure in May
Lewiston, ID
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in May
Lewiston, ID
- Average wind speed in May: 4.7mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest months (with the lowest average wind speed) are July, August and September (4.3mph).
Average humidity in May
Lewiston, ID
- Average humidity in May: 68%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (38%).
Average rainfall in May
Lewiston, ID
- Average rainfall in May: 1.42"
The wettest month (with the highest rainfall) is March (1.85").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in May
Lewiston, ID
- Average rainfall days in May: 13.6 days
The month with the highest number of rainy days is March (17.6 days).
The month with the least rainy days is August (5.2 days).
Average snowfall in May
Lewiston, ID
- Average snowfall in May: 0"
The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Lewiston, ID
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (8.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Lewiston, ID
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in May: 10h and 4min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in May
Lewiston, ID
- Average sunshine days in May: 15.3 days
The month with the most sunshine days is July (24 days).
The months with the least sunshine days are February and March (10.8 days).
Average UV index in May
Lewiston, ID
- Average UV index in May: 4
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in May
Lewiston, ID
- Average cloud cover in May: 30
The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in May
Lewiston, ID
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Lewiston, Idaho, USA
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