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
In the transition to September, Hilliard observes a drop in the average high-temperature, moving from a warm 77.5°F (25.3°C) in August to an agreeable 68.5°F (20.3°C). Hilliard observes a noteworthy temperature drop from the daily highs during September nights, with a mean temperature of 45°F (7.2°C).Humidity
In Hilliard, the average relative humidity in September is 44%.Rainfall
In Hilliard, during September, the rain falls for 8 days and regularly aggregates up to 0.71" (18mm) of precipitation. Throughout the year, there are 94.2 rainfall days, and 11.5" (292mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 1.1 snowfall days, it receives 0.91" (23mm) of snow. Throughout the year, there are 99.3 snowfall days, and 56.22" (1428mm) of snow is accumulated.Daylight
In Hilliard, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:50 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:06 pm MDT.
Sunshine
In Hilliard, the average sunshine in September is 10.3h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, a regular UV index of 4 translates into these guidelines:
Take precautions - Protection against sunburn is recommended. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Hilliard?
What is the average humidity in September?
How much does it rain in Hilliard in September?
When does it start snowing?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Hilliard, WY
- Average high temperature in September: 68.5°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is December (26.4°F).
- Average low temperature in September: 45°F
The month with the highest average low temperature is July (51.6°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in September
Hilliard, WY
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Hilliard, WY
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is April (8.2mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Hilliard, WY
- Average humidity in September: 44%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is August (39%).
Average rainfall in September
Hilliard, WY
- Average rainfall in September: 0.71"
The wettest months (with the highest rainfall) are April and May (1.38").
The driest month (with the least rainfall) is August (0.51").
Average rainfall days in September
Hilliard, WY
- Average rainfall days in September: 8 days
The month with the highest number of rainy days is May (11.9 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in September
Hilliard, WY
- Average snowfall in September: 0.91"
The month with the highest snowfall is March (10").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Hilliard, WY
- Average snowfall days in September: 1.1 days
The month with the highest number of snowfall days is February (16.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Hilliard, WY
- Average daylight in September: 12h 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 September: 10h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).
Average sunshine days in September
Hilliard, WY
- Average sunshine days in September: 17 days
The month with the most sunshine days is June (19.5 days).
The month with the least sunshine days is April (10.8 days).
Average UV index in September
Hilliard, WY
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover in September
Hilliard, WY
- Average cloud cover in September: 13
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
Hilliard, WY
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Hilliard, Wyoming, USA
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