Climate and monthly weather forecastAllen, SD
Climate and monthly weather forecast
Weather in January
January, the same as December, is an icy winter month in Allen, South Dakota, with an average temperature varying between 32.5°F (0.3°C) and 18.1°F (-7.7°C). January's climate shows a minor adjustment in average high-temperatures to a still icy 32.5°F (0.3°C) from December's 32.4°F (0.2°C). Weather in January »Weather in February
February, the last month of the winter in Allen, is another cold month, with an average temperature ranging between max 33.8°F (1°C) and min 18.9°F (-7.3°C). February begins with an average high-temperature of a still icy 33.8°F (1°C), reflecting close similarity to the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Allen, South Dakota, with temperature in the range of an average high of 48.7°F (9.3°C) and an average low of 30.6°F (-0.8°C). As Allen welcomes March, there is a noticeable shift in the average high-temperature, escalating from February's wintry 33.8°F (1°C) to a chilly 48.7°F (9.3°C). Weather in March »Weather in April
April is a mild spring month in Allen, South Dakota, with an average temperature varying between 37.6°F (3.1°C) and 55.9°F (13.3°C). The shift into April is marked by a modest rise in the average high-temperature, moving from March's chilly 48.7°F (9.3°C) to a moderate 55.9°F (13.3°C). Weather in April »Weather in May
May, the last month of the spring in Allen, is a comfortable month, with an average temperature fluctuating between 66.2°F (19°C) and 46.9°F (8.3°C). May's arrival brings a change in high-temperatures, moving from a moderate 55.9°F (13.3°C) in April to a comfortable 66.2°F (19°C). Weather in May »Weather in June
June, the first month of the summer in Allen, is a moderately hot month, with temperature in the range of an average high of 79.9°F (26.6°C) and an average low of 58.6°F (14.8°C). The arrival of June sees a shift in the average high-temperature, moving from a refreshing 66.2°F (19°C) in May to a warm 79.9°F (26.6°C). Weather in June »Weather in July
July in Allen, South Dakota, is a tropical summer month, with an average temperature fluctuating between 65.5°F (18.6°C) and 87.6°F (30.9°C). In Allen, the highest average temperatures are observed in July, with a high of 87.6°F (30.9°C) and a low of 65.5°F (18.6°C). The average heat index in July is estimated at a hot 89.6°F (32°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Allen, South Dakota, with an average temperature varying between 64°F (17.8°C) and 85.6°F (29.8°C). The shift from July to August is characterized by an average high-temperature of a moderately hot 85.6°F (29.8°C), not significantly different from the 87.6°F (30.9°C) of July. Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Allen, South Dakota, with an average temperature fluctuating between 77°F (25°C) and 55.9°F (13.3°C). The shift from August to September includes a small decrease in the average high-temperature, from 85.6°F (29.8°C) to a still moderately hot 77°F (25°C). Weather in September »Weather in October
October, like September, is a moderate autumn month in Allen, South Dakota, with an average temperature fluctuating between 41°F (5°C) and 58.5°F (14.7°C). A distinct shift in the average high-temperature is signaled in October, moving down from a moderately hot 77°F (25°C) in September to a mild 58.5°F (14.7°C). Weather in October »Weather in November
November, the last month of the autumn in Allen, is another chilly month, with an average temperature ranging between min 29.8°F (-1.2°C) and max 46.2°F (7.9°C). With the onset of November, Allen's average high-temperature adjusts, receding from October's moderate 58.5°F (14.7°C) to a frosty 46.2°F (7.9°C). Weather in November »Weather in December
December, the first month of the winter in Allen, is also a wintry month, with temperature in the range of an average low of 18.7°F (-7.4°C) and an average high of 32.4°F (0.2°C). Allen experiences its lowest average temperatures in December, reaching a peak of 32.4°F (0.2°C) and a minimum of 18.7°F (-7.4°C). Weather in December »Updated: Jun 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The most humid month in Allen is January, with an average relative humidity of 80%.
The month with the least rainfall is January, when the rain falls for 3.5 days and typically collects 0.55" (14mm) of precipitation.
Throughout the year, there are 86.7 rainfall days, and 13.66" (347mm) of precipitation is accumulated.
Months with snowfall are January through May, September through December.
In Allen, during the entire year, snow falls for 47.4 days and aggregates up to 22.72" (577mm) of snow.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February is the month with the most snowfall. Snow falls for 11.5 days and accumulates 4.02" (102mm) of snow.
February has the least sunshine of the year, with an average of 5.2h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
May is the month with the most rainfall in Allen. Rain falls for 13.1 days and accumulates 2.13" (54mm) of precipitation.
In Allen, snow does not fall in June through August.
With an average of 15h and 18min of daylight, June has the longest days of the year.
Temperature records mark July as the warmest month, with highs averaging 87.6°F (30.9°C) and lows at 65.5°F (18.6°C).
July is the month with the highest UV index, with an average maximum UV index of 7.
August is the least humid month, with an average relative humidity of 48%.
With an average of 11.8h of sunshine, August has the most sunshine of the year.
December, noted for its average high-temperature of 32.4°F (0.2°C) and an average low-temperature of 18.7°F (-7.4°C), is considered the coldest month.
December has the shortest days of the year, with an average of 9h and 0min of daylight.
Average temperature
Allen, SD
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (32.4°F).
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure
Allen, SD
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.85"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.94"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed
Allen, SD
- Average wind speed in January:
10.7mph - Average wind speed in February:
10.4mph - Average wind speed in March:
11.2mph - Average wind speed in April:
12.2mph - Average wind speed in May:
11.4mph - Average wind speed in June:
10.9mph
- Average wind speed in July:
10.4mph - Average wind speed in August:
10.2mph - Average wind speed in September:
11.2mph - Average wind speed in October:
11.4mph - Average wind speed in November:
10.7mph - Average wind speed in December:
10.4mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (10.2mph).
Average humidity
Allen, SD
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (48%).
Average rainfall
Allen, SD
- Average rainfall in January:
0.55" - Average rainfall in February:
0.79" - Average rainfall in March:
1.14" - Average rainfall in April:
1.81" - Average rainfall in May:
2.13" - Average rainfall in June:
1.42"
- Average rainfall in July:
1.26" - Average rainfall in August:
0.91" - Average rainfall in September:
1.02" - Average rainfall in October:
1.1" - Average rainfall in November:
0.67" - Average rainfall in December:
0.87"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days
Allen, SD
- Average rainfall days in January:
3.5 days - Average rainfall days in February:
2.5 days - Average rainfall days in March:
7.8 days - Average rainfall days in April:
12.6 days - Average rainfall days in May:
13.1 days - Average rainfall days in June:
10.4 days
- Average rainfall days in July:
10.1 days - Average rainfall days in August:
7.3 days - Average rainfall days in September:
6.1 days - Average rainfall days in October:
7.5 days - Average rainfall days in November:
3.3 days - Average rainfall days in December:
2.5 days
The month with the highest number of rainy days is May (13.1 days).
The months with the least rainy days are February and December (2.5 days).
Average snowfall
Allen, SD
- Average snowfall in January:
2.87" - Average snowfall in February:
4.02" - Average snowfall in March:
3.35" - Average snowfall in April:
2.09" - Average snowfall in May:
2.17" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Allen, SD
- Average snowfall days in January:
10.2 days - Average snowfall days in February:
11.5 days - Average snowfall days in March:
5.8 days - Average snowfall days in April:
3.5 days - Average snowfall days in May:
1.2 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 days - Average snowfall days in November:
4.9 days - Average snowfall days in December:
8.2 days
The month with the highest number of snowfall days is February (11.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Allen, SD
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 18min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 0min
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 January:
5h and 36min - Average sunshine in February:
5h and 12min - Average sunshine in March:
7h and 12min - Average sunshine in April:
9h and 6min - Average sunshine in May:
9h and 36min - Average sunshine in June:
11h and 6min
- Average sunshine in July:
11h and 36min - Average sunshine in August:
11h and 48min - Average sunshine in September:
10h and 12min - Average sunshine in October:
7h and 6min - Average sunshine in November:
6h and 18min - Average sunshine in December:
5h and 42min
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 12min).
Average sunshine days
Allen, SD
- Average sunshine days in January:
18.6 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
18.1 days - Average sunshine days in April:
13.2 days - Average sunshine days in May:
15.5 days - Average sunshine days in June:
18.2 days
- Average sunshine days in July:
18.3 days - Average sunshine days in August:
22.3 days - Average sunshine days in September:
22.8 days - Average sunshine days in October:
20.9 days - Average sunshine days in November:
21.4 days - Average sunshine days in December:
20.8 days
The month with the most sunshine days is September (22.8 days).
The month with the least sunshine days is April (13.2 days).
Average UV index
Allen, SD
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
Allen, SD
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility
Allen, SD
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).
