September weather forecastHarvard, ID
September
Weather in September
The first month of the autumn, September, is still a warm month in Harvard, Idaho, with an average temperature varying between 51.4°F (10.8°C) and 73.4°F (23°C).Temperature
Welcoming September, Harvard observes a shift in the average high-temperature, falling from August's 83.7°F (28.7°C) to a still warm 73.4°F (23°C). September in Harvard, marked by an average low-temperature of 51.4°F (10.8°C), indicates a large temperature drop from the daytime peak.Humidity
The average relative humidity in September in Harvard is 48%.Rainfall
In Harvard, during September, the rain falls for 8.1 days and regularly aggregates up to 0.63" (16mm) of precipitation. In Harvard, during the entire year, the rain falls for 143.2 days and collects up to 20.51" (521mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Harvard, Idaho. Throughout September, in the average 0.2 snowfall days, it receives 0.28" (7mm) of snow. In Harvard, Idaho, during the entire year, snow falls for 60.2 days and aggregates up to 47.24" (1200mm) of snow.Daylight
The average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:07 am and sunset at 7:25 pm. On the last day of September, sunrise is at 6:45 am and sunset at 6:27 pm PDT.
Sunshine
The average sunshine in September is 10.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: An average UV index of 4 in September transforms into this advice:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Harvard, ID
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is August (83.7°F).
The month with the lowest average high temperature is December (34°F).
- Average low temperature in September: 51.4°F
The month with the highest average low temperature is August (58.1°F).
The coldest month (with the lowest average low temperature) is December (24.1°F).
Average pressure in September
Harvard, ID
- Average pressure in September: 29.96"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 September
Harvard, ID
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest months (with the lowest average wind speed) are July, August and September (4.8mph).
Average humidity in September
Harvard, ID
- Average humidity in September: 48%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Harvard, ID
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is December (2.68").
The driest months (with the least rainfall) are July and August (0.47").
Average rainfall days in September
Harvard, ID
- Average rainfall days in September: 8.1 days
The month with the highest number of rainy days is April (18.1 days).
The months with the least rainy days are July and August (5.9 days).
Average snowfall in September
Harvard, ID
- Average snowfall in September: 0.28"
The month with the highest snowfall is January (12.56").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Harvard, ID
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (14.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Harvard, ID
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 10h and 18min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 30min).
Average sunshine days in September
Harvard, ID
- Average sunshine days in September: 20.1 days
The month with the most sunshine days is July (23.3 days).
The month with the least sunshine days is February (9.2 days).
Average UV index in September
Harvard, ID
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Harvard, ID
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in September
Harvard, ID
- Average visibility in September: 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 and December (4mi).
