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 ushers in a minor alteration in Martin's climate, with the average high-temperature moving from August's warm 84.7°F (29.3°C) to a still moderately hot 76.1°F (24.5°C). Nighttime temperatures consistently average a mild 55.8°F (13.2°C) during September.Humidity
August and September, with an average relative humidity of 51%, are the least humid months.Rainfall
In Martin, in September, during 9.5 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Martin, during the entire year, the rain falls for 108 days and collects up to 15.39" (391mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. In Martin, during the entire year, snow falls for 47.3 days and aggregates up to 19.76" (502mm) of snow.Daylight
In Martin, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:12 am and sunset at 7:21 pm. On the last day of September, sunrise is at 6:44 am and sunset at 6:29 pm MDT.
Sunshine
In September, the average sunshine is 10.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Be vigilant - Preventing sunburn is recommended. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What are the least humid months in Martin?
What is the average humidity in September?
How much does it rain in September?
When does it start snowing?
How many hours of daylight does Martin have in September?
When 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
Martin, SD
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is December (32°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in September
Martin, SD
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Martin, SD
- Average wind speed in September: 11.5mph
The windiest month (with the highest average wind speed) is April (12.9mph).
The calmest month (with the lowest average wind speed) is August (10.4mph).
Average humidity in September
Martin, SD
- Average humidity in September: 51%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are August and September (51%).
Average rainfall in September
Martin, SD
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is May (2.4").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Martin, SD
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is December (2.8 days).
Average snowfall in September
Martin, SD
- Average snowfall in September: 0.04"
The month with the highest snowfall is March (3.58").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Martin, SD
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Martin, SD
- Average daylight in September: 12h and 3min
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 6min).
- Average sunshine in September: 10h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).
Average sunshine days in September
Martin, SD
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is December (21 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in September
Martin, SD
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Martin, SD
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Martin, SD
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Martin, South Dakota, USA
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