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
The beginning of September in Rolla subtly marks a decrease in the average high-temperature, transitioning from a hot 87.3°F (30.7°C) in August to a moderately hot 80.4°F (26.9°C). Rolla experiences a mean low-temperature of 59°F (15°C) during September.Humidity
In Rolla, the average relative humidity in September is 73%.Rainfall
In Rolla, in September, during 12.1 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. Throughout the year, in Rolla, Missouri, there are 147.2 rainfall days, and 31.02" (788mm) of precipitation is accumulated.Snowfall
In Rolla, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:37 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:51 pm CDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In Rolla, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The daily maximum UV index of 5 in September interprets into the following advice:
Exercise prevention - Precautions against solar damage are endorsed. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Frequently asked questions
What are the temperatures in Rolla in September?
What is the average humidity in September in Rolla?
How much does it rain in Rolla in September?
When it does not snow in Rolla?
Does it snow in Rolla in September?
What is the average length of the day in September in Rolla?
When are sunrise and sunset in September in Rolla?
How many hours of sunshine does Rolla have in September?
What is the UV index reading in September in Rolla?
Average temperature in September
Rolla, MO
- Average high temperature in September: 80.4°F
The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is January (39.2°F).
- Average low temperature in September: 59°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in September
Rolla, MO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Rolla, MO
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in September
Rolla, MO
- Average humidity in September: 73%
The months with the highest relative humidity are March and May (77%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Rolla, MO
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is November (1.65").
Average rainfall days in September
Rolla, MO
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is December (7 days).
Average snowfall in September
Rolla, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Rolla, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rolla, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Rolla, MO
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (11.4 days).
Average UV index in September
Rolla, MO
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Rolla, MO
- Average cloud cover in September: 31
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Rolla, MO
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Rolla, Missouri, USA
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