Climate and monthly weather forecastErwin, SD
Climate and monthly weather forecast
Weather in January
January, the same as December, in Erwin, South Dakota, is a freezing cold winter month, with temperature in the range of an average high of -7°C and an average low of -14.7°C. Erwin's January weather, marked by an average high temperature of -7°C and an average low temperature of -14.7°C, is the coldest in the year. Weather in January »Weather in February
February, the last month of the winter in Erwin, is another freezing cold month, with an average temperature varying between -13.1°C and -5.3°C. Erwin observes an average high-temperature of a still freezing cold -5.3°C in February, barely different from -7°C in January. Weather in February »Weather in March
March, the first month of the spring in Erwin, is an icy month, with temperature in the range of an average low of -4.6°C and an average high of 3.4°C. In Erwin, the average high-temperature in March soars, from a freezing cold -5.3°C in February, to a cold 3.4°C. Weather in March »Weather in April
April in Erwin, South Dakota, is a fresh spring month, with an average temperature fluctuating between 1.8°C and 10.9°C. An upsurge in temperatures occurs as March gives way to April, with average highs shifting from a wintry 3.4°C to a cool 10.9°C. Weather in April »Weather in May
The last month of the spring, May, is an enjoyable month in Erwin, South Dakota, with an average temperature varying between 18.1°C and 8.3°C. May's onset brings a rise in the average high-temperature, moving from a cool 10.9°C in April to a comfortable 18.1°C. Weather in May »Weather in June
June, the first month of the summer in Erwin, is a moderately hot month, with an average temperature varying between 23.6°C and 13.8°C. The shift into June brings an increase in the average high-temperature, moving from an enjoyable 18.1°C in May to a warm 23.6°C. Weather in June »Weather in July
July, like June, in Erwin, South Dakota, is another warm summer month, with an average temperature fluctuating between 27.1°C and 16°C. Erwin's July weather, marked by an average high temperature of 27.1°C and an average low temperature of 16°C, is the warmest in the year. For most parts of July, the heat index is computed to be 29°C. Weather in July »Weather in August
August, the last month of the summer in Erwin, is another warm month, with an average temperature ranging between max 26.7°C and min 15°C. With the transition into August, Erwin notes an average high-temperature of a still moderately hot 26.7°C, closely resembling July. Weather in August »Weather in September
September, the first month of the autumn in Erwin, is also an agreeable month, with an average temperature ranging between max 22°C and min 10.7°C. The move into September indicates a slight reduction in the average high-temperature, down from August's warm 26.7°C to a pleasant 22°C. Weather in September »Weather in October
October, the same as September, is another fresh autumn month in Erwin, South Dakota, with temperature in the range of an average low of 3.9°C and an average high of 12.4°C. October signals a considerable drop in Erwin's average high-temperature, reducing from a pleasant 22°C in September to a fresh 12.4°C. Weather in October »Weather in November
The last month of the autumn, November, is another cold month in Erwin, South Dakota, with an average temperature varying between -3.1°C and 4.5°C. In Erwin, entering November brings a temperature decrement, reducing from October's fresh 12.4°C to an icy 4.5°C. Weather in November »Weather in December
December, the first month of the winter in Erwin, is still a freezing cold month, with an average temperature varying between -10.9°C and -4.6°C. The arrival of December brings a significant change in Erwin's weather, with average high-temperatures dropping from November's icy 4.5°C to a freezing cold -4.6°C. Weather in December »Updated: Feb 14, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
With average high temperatures of -7°C and lows of -14.7°C, January is the coldest month in Erwin.
With an average relative humidity of 90%, January is the most humid month.
The months with the least rainfall in Erwin, South Dakota, are January and February Rain falls for 2.9 days and accumulates 15mm of rain.
Throughout the year, in Erwin, South Dakota, there are 112.3 rainfall days, and 477mm of precipitation is accumulated.
January through May, October through December are months with snowfall.
The months with the most snowfall are January and December, with an average 95mm of accumulated snow.
In Erwin, during the entire year, snow falls for 64.3 days and aggregates up to 446mm of snow.
With an average of 3.6h of sunshine, January has the least sunshine of the year in Erwin.
The months with the lowest UV index in Erwin are January and December, with an average maximum UV index of 1.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Erwin, South Dakota, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
The month with the most rainfall in Erwin is June, when the rain falls for 17.2 days and typically aggregates up to 81mm of precipitation.
In Erwin, snow does not fall in June through September.
June has the longest days of the year, with an average of 15h and 30min of daylight.
The months with the highest UV index are June and July, with an average maximum UV index of 6.
In Erwin, July is the warmest month, with temperatures averaging a high of 27.1°C and a low of 16°C.
July has the most sunshine of the year in Erwin, South Dakota, with an average of 10.7h of sunshine.
September and October, with an average relative humidity of 68%, are the least humid months in Erwin, South Dakota.
December has the shortest days of the year, with an average of 8h and 54min of daylight.
Average temperature
Erwin, SD
The warmest month (with the highest average high temperature) is July (27.1°C).
The month with the lowest average high temperature is January (-7°C).
The month with the highest average low temperature is July (16°C).
The coldest month (with the lowest average low temperature) is January (-14.7°C).
Average pressure
Erwin, SD
- Average pressure in January:
1021.3mbar - Average pressure in February:
1021.5mbar - Average pressure in March:
1018.5mbar - Average pressure in April:
1014.2mbar - Average pressure in May:
1013.3mbar - Average pressure in June:
1011mbar
- Average pressure in July:
1013.2mbar - Average pressure in August:
1013.3mbar - Average pressure in September:
1014.9mbar - Average pressure in October:
1015.2mbar - Average pressure in November:
1017.9mbar - Average pressure in December:
1020.2mbar
The month with the highest atmospheric pressure is February (1021.5mbar).
The month with the lowest atmospheric pressure is June (1011mbar).
Average wind speed
Erwin, SD
- Average wind speed in January:
17.7km/h - Average wind speed in February:
17.4km/h - Average wind speed in March:
17.5km/h - Average wind speed in April:
18.7km/h - Average wind speed in May:
16.6km/h - Average wind speed in June:
15.1km/h
- Average wind speed in July:
13.7km/h - Average wind speed in August:
13.9km/h - Average wind speed in September:
16.1km/h - Average wind speed in October:
18km/h - Average wind speed in November:
17.7km/h - Average wind speed in December:
17.7km/h
The windiest month (with the highest average wind speed) is April (18.7km/h).
The calmest month (with the lowest average wind speed) is July (13.7km/h).
Average humidity
Erwin, SD
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are September and October (68%).
Average rainfall
Erwin, SD
The wettest month (with the highest rainfall) is June (81mm).
The driest months (with the least rainfall) are January and February (15mm).
Average rainfall days
Erwin, SD
- Average rainfall days in January:
2.9 days - Average rainfall days in February:
2.7 days - Average rainfall days in March:
7.8 days - Average rainfall days in April:
11.6 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
17.2 days
- Average rainfall days in July:
14.3 days - Average rainfall days in August:
12.4 days - Average rainfall days in September:
10.4 days - Average rainfall days in October:
8.3 days - Average rainfall days in November:
4.9 days - Average rainfall days in December:
3.5 days
The month with the highest number of rainy days is June (17.2 days).
The month with the least rainy days is February (2.7 days).
Average snowfall
Erwin, SD
The months with the highest snowfall are January and December (95mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days
Erwin, SD
- Average snowfall days in January:
14.4 days - Average snowfall days in February:
11.8 days - Average snowfall days in March:
10 days - Average snowfall days in April:
4.8 days - Average snowfall days in May:
0.8 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.1 days - Average snowfall days in October:
2.3 days - Average snowfall days in November:
7.1 days - Average snowfall days in December:
13 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Erwin, SD
- Average daylight in January:
9h and 18min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 48min - Average daylight in June:
15h and 30min
- Average daylight in July:
15h and 6min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 36min - Average daylight in December:
8h and 54min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January:
3h and 36min - Average sunshine in February:
4h and 18min - Average sunshine in March:
5h and 24min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 54min
- Average sunshine in July:
10h and 42min - Average sunshine in August:
10h and 18min - Average sunshine in September:
8h and 48min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 12min - Average sunshine in December:
4h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Erwin, SD
- Average sunshine days in January:
15.1 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
14.2 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
11.9 days - Average sunshine days in June:
10.3 days
- Average sunshine days in July:
13.8 days - Average sunshine days in August:
15.7 days - Average sunshine days in September:
18.2 days - Average sunshine days in October:
19.1 days - Average sunshine days in November:
19 days - Average sunshine days in December:
16.3 days
The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is June (10.3 days).
Average UV index
Erwin, SD
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Erwin, SD
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility
Erwin, SD
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is January (8km).
