Climate and monthly weather forecastGrenville, SD
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Grenville, South Dakota, with an average temperature fluctuating between 18.9°F (-7.3°C) and 5°F (-15°C). The month of January sees the lowest average temperatures, reaching 18.9°F (-7.3°C) at the peak and 5°F (-15°C) at the low. Weather in January »Weather in February
The last month of the winter, February, is another freezing cold month in Grenville, South Dakota, with an average temperature varying between 21.4°F (-5.9°C) and 7.2°F (-13.8°C). As Grenville welcomes February, the average high-temperature is noted at a still freezing cold 21.4°F (-5.9°C), closely aligning with the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a wintry month in Grenville, South Dakota, with an average temperature ranging between min 23.2°F (-4.9°C) and max 37.6°F (3.1°C). March is characterized by a clear rise in the average high-temperature, escalating from February's freezing cold 21.4°F (-5.9°C) to an icy 37.6°F (3.1°C). Weather in March »Weather in April
April in Grenville, South Dakota, is a fresh spring month, with an average temperature fluctuating between 51.1°F (10.6°C) and 35.1°F (1.7°C). As Grenville welcomes April, the average high-temperature sees a rise, transitioning from a cold 37.6°F (3.1°C) in March to a fresh 51.1°F (10.6°C). Weather in April »Weather in May
May, the last month of the spring in Grenville, is an enjoyable month, with an average temperature fluctuating between 46.6°F (8.1°C) and 64°F (17.8°C). The transition to May introduces an increase in the average high-temperature, shifting from a cool 51.1°F (10.6°C) in April to a comfortable 64°F (17.8°C). Weather in May »Weather in June
June, the first month of the summer in Grenville, is a moderately hot month, with an average temperature fluctuating between 56.3°F (13.5°C) and 74.3°F (23.5°C). As May transitions into June, Grenville sees a rise in the average high-temperature, moving from an enjoyable 64°F (17.8°C) to a warm 74.3°F (23.5°C). Weather in June »Weather in July
July, like June, in Grenville, South Dakota, is another warm summer month, with temperature in the range of an average low of 61.3°F (16.3°C) and an average high of 81°F (27.2°C). July, known for its average high temperature of 81°F (27.2°C) and an average low temperature of 61.3°F (16.3°C), is the warmest month. The heat index value during July is calculated to be 84.2°F (29°C). Weather in July »Weather in August
August, the last month of the summer in Grenville, is another warm month, with temperature in the range of an average low of 58.8°F (14.9°C) and an average high of 80.1°F (26.7°C). Grenville signifies an average high-temperature of a still moderately hot 80.1°F (26.7°C) in August, closely mirroring the 81°F (27.2°C) of July. Weather in August »Weather in September
The first month of the autumn, September, is also an agreeable month in Grenville, South Dakota, with temperature in the range of an average low of 51.3°F (10.7°C) and an average high of 71.6°F (22°C). With the commencement of September, Grenville records a moderate temperature decline, with the average high easing from August's moderately hot 80.1°F (26.7°C) to an agreeable 71.6°F (22°C). Weather in September »Weather in October
October, the same as September, is a cool autumn month in Grenville, South Dakota, with an average temperature varying between 53.8°F (12.1°C) and 38.7°F (3.7°C). October's onset witnesses a marked shift in the average high-temperature, moving from a pleasant 71.6°F (22°C) in September to a fresh 53.8°F (12.1°C). Weather in October »Weather in November
November, the last month of the autumn in Grenville, is also a wintry month, with temperature in the range of an average low of 25.7°F (-3.5°C) and an average high of 38.8°F (3.8°C). Grenville in November sees a clear temperature decline, with average high-temperatures decreasing from a fresh 53.8°F (12.1°C) in October to an icy 38.8°F (3.8°C). Weather in November »Weather in December
The first month of the winter, December, is still a freezing cold month in Grenville, South Dakota, with an average temperature ranging between max 23.2°F (-4.9°C) and min 11.5°F (-11.4°C). With the onset of December, Grenville's average high-temperature experiences a noticeable drop, receding from November's icy 38.8°F (3.8°C) to a subzero cold 23.2°F (-4.9°C). Weather in December »Updated: Jul 29, 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
January, recording an average high temperature of 18.9°F (-7.3°C) and a low temperature of 5°F (-15°C), is Grenville's coldest month.
January is the most humid month, with an average relative humidity of 91%.
In Grenville, during the entire year, the rain falls for 112.9 days and collects up to 22.09" (561mm) of precipitation.
Months with snowfall in Grenville, South Dakota, are January through May, October through December.
In Grenville, South Dakota, during the entire year, snow falls for 68.4 days and aggregates up to 23.74" (603mm) of snow.
With an average of 3.2h of sunshine, January has the least sunshine of the year.
The months with the lowest UV index in Grenville are January, November and December, with an average maximum UV index of 1.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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.
June through September are months without snowfall in Grenville.
The month with the longest days is June, with an average of 15h and 36min of daylight.
The months with the highest UV index are June and July, with an average maximum UV index of 6.
In Grenville, July is the warmest month, with temperatures averaging a high of 81°F (27.2°C) and a low of 61.3°F (16.3°C).
July is the month with the most rainfall. Rain falls for 14.4 days and accumulates 3.58" (91mm) of precipitation.
The month with the most sunshine is July, with an average of 10.7h of sunshine.
The least humid month is September, with an average relative humidity of 66%.
The month with the least rainfall is November, when the rain falls for 4.6 days and typically collects 0.63" (16mm) of precipitation.
The month with the most snowfall is December, when snow falls for 14.6 days and typically aggregates up to 4.53" (115mm) of snow.
The month with the shortest days is December, with an average of 8h and 48min of daylight.
Average temperature
Grenville, SD
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (18.9°F).
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (5°F).
Average pressure
Grenville, SD
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.17"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.85"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed
Grenville, SD
- Average wind speed in January:
11mph - Average wind speed in February:
10.6mph - Average wind speed in March:
11mph - Average wind speed in April:
11.7mph - Average wind speed in May:
10.5mph - Average wind speed in June:
9.6mph
- Average wind speed in July:
8.7mph - Average wind speed in August:
8.8mph - Average wind speed in September:
10.3mph - Average wind speed in October:
11.3mph - Average wind speed in November:
11mph - Average wind speed in December:
11mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is July (8.7mph).
Average humidity
Grenville, SD
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is September (66%).
Average rainfall
Grenville, SD
- Average rainfall in January:
0.71" - Average rainfall in February:
0.71" - Average rainfall in March:
1.26" - Average rainfall in April:
1.93" - Average rainfall in May:
2.72" - Average rainfall in June:
3.46"
- Average rainfall in July:
3.58" - Average rainfall in August:
2.01" - Average rainfall in September:
1.57" - Average rainfall in October:
2.52" - Average rainfall in November:
0.63" - Average rainfall in December:
0.98"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is November (0.63").
Average rainfall days
Grenville, SD
- Average rainfall days in January:
2.5 days - Average rainfall days in February:
2.3 days - Average rainfall days in March:
8.1 days - Average rainfall days in April:
11.3 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
17.9 days
- Average rainfall days in July:
14.4 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
8.8 days - Average rainfall days in November:
4.6 days - Average rainfall days in December:
4.1 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (2.3 days).
Average snowfall
Grenville, SD
- Average snowfall in January:
4.45" - Average snowfall in February:
4.29" - Average snowfall in March:
3.19" - Average snowfall in April:
2.64" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is December (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Grenville, SD
- Average snowfall days in January:
15.1 days - Average snowfall days in February:
12.5 days - Average snowfall days in March:
10.4 days - Average snowfall days in April:
5.8 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 days - Average snowfall days in October:
2.6 days - Average snowfall days in November:
6.6 days - Average snowfall days in December:
14.6 days
The month with the highest number of snowfall days is January (15.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Grenville, SD
- Average daylight in January:
9h and 12min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
14h and 54min - Average daylight in June:
15h and 36min
- Average daylight in July:
15h and 18min - Average daylight in August:
14h and 6min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 30min - Average daylight in December:
8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January:
3h and 12min - Average sunshine in February:
4h and 0min - Average sunshine in March:
5h and 12min - Average sunshine in April:
7h and 18min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 48min
- 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:
5h and 54min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 36min
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 12min).
Average sunshine days
Grenville, SD
- Average sunshine days in January:
14.3 days - Average sunshine days in February:
14.9 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
13 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
10.4 days
- Average sunshine days in July:
13.7 days - Average sunshine days in August:
16.5 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
17.6 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
15.2 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (10.4 days).
Average UV index
Grenville, SD
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover
Grenville, SD
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility
Grenville, SD
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, February, March and December (5mi).
