Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September implies a gentle temperature shift, with average high-temperatures reducing from August's moderately hot 79.9°F (26.6°C) to a pleasant 68.5°F (20.3°C). Despite a significant disparity with daytime temperatures, an average low-temperature of 41.9°F (5.5°C) is recorded in Dover during September.Humidity
The average relative humidity in September is 62%.Rainfall
In September, in Dover, Idaho, the rain falls for 9.5 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. Throughout the year, in Dover, there are 151 rainfall days, and 23.98" (609mm) of precipitation is accumulated.Snowfall
Months with snowfall in Dover, Idaho, are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.59" (15mm) of snow. Throughout the year, in Dover, there are 80.7 snowfall days, and 61.3" (1557mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 34min.On the first day of the month, sunrise is at 6:05 am and sunset at 7:27 pm. On the last day of September, sunrise is at 6:45 am and sunset at 6:26 pm PDT.
Sunshine
The average sunshine in September is 9.7h.UV index
The average daily maximum UV index in September in Dover is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 3 during September translates into the following guidance:
Exercise prevention - Precautions against solar damage are endorsed. To guard against the harmful effects of the Sun, minimize exposure during midday. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
What is the average September temperature in Dover?
What is the average humidity in September in Dover?
How much does it rain in Dover in September?
When does it start to snow in Dover?
How many hours of daylight does Dover have in September?
What time are sunrise and sunset in September in Dover?
How long on average sun shines in September in Dover?
How high is the UV index in September in Dover?
Average temperature in September
Dover, ID
- Average high temperature in September: 68.5°F
The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is December (28.9°F).
- Average low temperature in September: 41.9°F
The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (18.5°F).
Average pressure in September
Dover, ID
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).
Average wind speed in September
Dover, ID
- Average wind speed in September: 3.8mph
The windiest month (with the highest average wind speed) is April (4.5mph).
The calmest month (with the lowest average wind speed) is December (3.4mph).
Average humidity in September
Dover, ID
- Average humidity in September: 62%
The month with the highest relative humidity is January (95%).
The month with the lowest relative humidity is August (53%).
Average rainfall in September
Dover, ID
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is January (3.35").
The driest month (with the least rainfall) is August (0.43").
Average rainfall days in September
Dover, ID
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is March (18.8 days).
The month with the least rainy days is August (6.3 days).
Average snowfall in September
Dover, ID
- Average snowfall in September: 0.59"
The month with the highest snowfall is January (17.28").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Dover, ID
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (18.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Dover, ID
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
Dover, ID
- Average sunshine days in September: 18.5 days
The months with the most sunshine days are July and August (21.4 days).
The month with the least sunshine days is March (7.9 days).
Average UV index in September
Dover, ID
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February, November and December (UV index 1).
Average cloud cover in September
Dover, ID
- Average cloud cover in September: 25
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
Dover, ID
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January and February (3mi).
Dover, Idaho, USA
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