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
With the arrival of May, the average high-temperature transitions from a mild 59°F (15°C) in April to an agreeable 71.1°F (21.7°C). Lewiston temperatures generally rest at a low of 54.1°F (12.3°C) during the May nights.Humidity
In Lewiston, the average relative humidity in May is 77%.Rainfall
May is the month with the most rainfall in Lewiston. Rain falls for 18.5 days and accumulates 3.31" (84mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. May is the last month it regularly snows in Lewiston. During 0.1 snowfall days, in May, Lewiston aggregates 0.04" (1mm) of snow. In Lewiston, Indiana, during the entire year, snow falls for 40.3 days and aggregates up to 10.91" (277mm) of snow.Daylight
The average length of the day in May is 14h and 30min.On the first day of May, sunrise is at 5:44 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 5:18 am and sunset at 8:13 pm CDT.
Sunshine
In May, the average sunshine in Lewiston is 8.5h.UV index
The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 5 in May translates into the following instructions:
Prioritize safety - Suggestions to prevent sun damage are offered. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Frequently asked questions
What are May temperatures in Lewiston?
What is the average humidity in May in Lewiston?
What is the rainiest month in Lewiston?
How much does it rain in Lewiston in May?
What is the last month it snows in Lewiston?
How many hours of daylight does Lewiston have in May?
When is the sunrise / sunset in May in Lewiston?
How long on average sun shines in May in Lewiston?
What is the UV index reading in May in Lewiston?
Average temperature in May
Lewiston, IN
- Average high temperature in May: 71.1°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in May: 54.1°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in May
Lewiston, IN
- Average pressure in May: 29.97"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Lewiston, IN
- Average wind speed in May: 8.5mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in May
Lewiston, IN
- Average humidity in May: 77%
The months with the highest relative humidity are July and August (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Lewiston, IN
- Average rainfall in May: 3.31"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (1.02").
Average rainfall days in May
Lewiston, IN
- Average rainfall days in May: 18.5 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in May
Lewiston, IN
- Average snowfall in May: 0.04"
The month with the highest snowfall is February (3.23").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Lewiston, IN
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Lewiston, IN
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 8h and 3min
The months with the most sunshine are June and July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in May
Lewiston, IN
- Average sunshine days in May: 10.3 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is July (9.6 days).
Average UV index in May
Lewiston, IN
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Lewiston, IN
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July, August and September (Cloud cover 35).
Average visibility in May
Lewiston, IN
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Lewiston, Indiana, USA
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