May weather forecastNampa, ID
May
Weather in May
May signifies the end of spring and commencement of summer in Nampa. As does the transition of seasons, temperatures also rise leading to increasingly warm days. Long daylight hours provide an excellent chance to partake in various outdoor events, celebrating the start of the summer. Numerous parks around Nampa adorn themselves in lush green attire during this month. The feel of May is warm, lively, and marks the preface to Idaho's hot summer season.Temperature
May's arrival in Nampa coincides with a rise in the average high-temperature, moving from April's refreshing 60.4°F (15.8°C) to an agreeable 70.3°F (21.3°C). Nampa registers a significant drop in temperature in May, with average nighttime lows of 47.7°F (8.7°C).Humidity
In Nampa, the average relative humidity in May is 46%.Rainfall
In Nampa, in May, it is raining for 9.4 days, with typically 0.87" (22mm) of accumulated precipitation. In Nampa, during the entire year, the rain falls for 98.5 days and collects up to 9.69" (246mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Nampa, the average length of the day in May is 14h and 44min.On the first day of May, sunrise is at 6:37 am and sunset at 8:49 pm. On the last day of the month, sunrise is at 6:07 am and sunset at 9:20 pm MDT.
Sunshine
In Nampa, the average sunshine in May is 11.1h.UV index
The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 5 in May, converts into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Nampa, ID
- Average high temperature in May: 70.3°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in May: 47.7°F
The month with the highest average low temperature is August (63.3°F).
The coldest month (with the lowest average low temperature) is December (25.7°F).
Average pressure in May
Nampa, ID
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Nampa, ID
- Average wind speed in May: 7mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest month (with the lowest average wind speed) is January (5.8mph).
Average humidity in May
Nampa, ID
- Average humidity in May: 46%
The month with the highest relative humidity is January (78%).
The months with the lowest relative humidity are July and August (29%).
Average rainfall in May
Nampa, ID
- Average rainfall in May: 0.87"
The wettest month (with the highest rainfall) is March (1.46").
The driest months (with the least rainfall) are July and August (0.12").
Average rainfall days in May
Nampa, ID
- Average rainfall days in May: 9.4 days
The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is August (3.1 days).
Average snowfall in May
Nampa, ID
- Average snowfall in May: 0"
The month with the highest snowfall is January (3.23").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Nampa, ID
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (6.6 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
Nampa, ID
- Average daylight in May: 14h and 42min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 11h and 6min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 48min).
Average sunshine days in May
Nampa, ID
- Average sunshine days in May: 19.6 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is March (14 days).
Average UV index in May
Nampa, ID
- Average UV index in May: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Nampa, ID
- Average cloud cover in May: 23
The months with the most cloud cover are January and December (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in May
Nampa, ID
- 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).
