September weather forecastHill City, ID
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Hill City, Idaho, with an average temperature varying between 49.1°F (9.5°C) and 70.7°F (21.5°C).Temperature
The onset of September results in a decrease in the average high-temperature, receding from a warm 81.1°F (27.3°C) in August to an agreeable 70.7°F (21.5°C). Hill City undergoes a major shift from daytime highs, averaging a frosty 49.1°F (9.5°C) during the night in September.Humidity
In Hill City, the average relative humidity in September is 41%.Rainfall
In Hill City, in September, during 7.5 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. Throughout the year, in Hill City, there are 116.2 rainfall days, and 21.3" (541mm) of precipitation is accumulated.Snowfall
July through September are months without snowfall in Hill City, Idaho.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 7:05 am and sunset at 8:14 pm. On the last day of September, in Hill City, Idaho, sunrise is at 7:37 am and sunset at 7:22 pm MDT.
Sunshine
In September, the average sunshine in Hill City is 9.5h.UV index
The average daily maximum UV index in September in Hill City is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hill City, ID
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is December (29.7°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is August (56.5°F).
The coldest month (with the lowest average low temperature) is December (16.7°F).
Average pressure in September
Hill City, ID
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Hill City, ID
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is January (5.3mph).
Average humidity in September
Hill City, ID
- Average humidity in September: 41%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is July (33%).
Average rainfall in September
Hill City, ID
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is February (3.07").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Hill City, ID
- Average rainfall days in September: 7.5 days
The months with the highest number of rainy days are March and April (14.9 days).
The month with the least rainy days is July (5.3 days).
Average snowfall in September
Hill City, ID
- Average snowfall in September: 0"
The month with the highest snowfall is January (20.2").
The months with the least snowfall are July, August and September (0").
Average snowfall days in September
Hill City, ID
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (15 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Hill City, ID
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in September
Hill City, ID
- Average sunshine days in September: 21 days
The month with the most sunshine days is July (22.7 days).
The month with the least sunshine days is March (10.9 days).
Average UV index in September
Hill City, ID
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Hill City, ID
- Average cloud cover in September: 15
The month with the most cloud cover is February (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in September
Hill City, 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, February and December (5mi).
