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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is a freezing cold winter month in Griswold, Iowa, with an average temperature ranging between min 15.1°F (-9.4°C) and max 28.4°F (-2°C). In Griswold, the month of January registers the lowest temperatures, averaging 28.4°F (-2°C) at the peak and 15.1°F (-9.4°C) at the lowest. Weather in January »
Weather in February
The last month of the winter, February, is a wintry month in Griswold, Iowa, with an average temperature varying between 32°F (0°C) and 18.1°F (-7.7°C). Griswold's February reports an average high-temperature of an icy 32°F (0°C), exhibiting a minor difference from January. Weather in February »
Weather in March
March, the first month of the spring in Griswold, is a chilly month, with an average temperature ranging between min 32.5°F (0.3°C) and max 47.8°F (8.8°C). March brings with it a considerable temperature increase, with average high-temperatures rising from February's cold 32°F (0°C) to a chilly 47.8°F (8.8°C). Weather in March »
Weather in April
April in Griswold, Iowa, is a moderate spring month, with temperature in the range of an average high of 59.5°F (15.3°C) and an average low of 42.4°F (5.8°C). April sees a temperature increase, moving from a chilly 47.8°F (8.8°C) in March to a moderate 59.5°F (15.3°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Griswold, Iowa, with an average temperature ranging between min 52.9°F (11.6°C) and max 69.6°F (20.9°C). May signals a shift in the average high-temperature, moving from April's mild 59.5°F (15.3°C) to an agreeable 69.6°F (20.9°C). Weather in May »
Weather in June
June, the first month of the summer in Griswold, is a warm month, with an average temperature ranging between min 63.1°F (17.3°C) and max 79.9°F (26.6°C). In Griswold, the average high-temperature in June increases from an agreeable 69.6°F (20.9°C) in May to a moderately hot 79.9°F (26.6°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Griswold, Iowa, with an average temperature varying between 65.1°F (18.4°C) and 82.6°F (28.1°C). Temperature records mark July as the warmest month, with highs averaging 82.6°F (28.1°C) and lows at 65.1°F (18.4°C). In July, the average heat index is evaluated 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 Griswold, Iowa, with an average temperature varying between 62.2°F (16.8°C) and 81.1°F (27.3°C). Transitioning from July to August, Griswold observes an average high-temperature of a still warm 81.1°F (27.3°C), differing subtly from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Griswold, is still a warm month, with temperature in the range of an average low of 55.9°F (13.3°C) and an average high of 75°F (23.9°C). September heralds a minor drop in average high-temperature, sliding from August's 81.1°F (27.3°C) to a still moderately hot 75°F (23.9°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Griswold, Iowa, with an average temperature varying between 43.7°F (6.5°C) and 60.4°F (15.8°C). A distinct shift in the average high-temperature is signaled in October, moving down from a moderately hot 75°F (23.9°C) in September to a mild 60.4°F (15.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Griswold, is another chilly month, with an average temperature ranging between max 47.1°F (8.4°C) and min 32.4°F (0.2°C). November brings a drop in Griswold's average high-temperature, falling from a mild 60.4°F (15.8°C) in October to a frosty 47.1°F (8.4°C). Weather in November »
Weather in December
December, the first month of the winter in Griswold, is also an icy month, with temperature in the range of an average low of 21°F (-6.1°C) and an average high of 33.4°F (0.8°C). With the onset of December, Griswold's average high-temperature adjusts, receding from November's chilly 47.1°F (8.4°C) to a cold 33.4°F (0.8°C). Weather in December »
Updated: Jul 25, 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
What is the coldest time of year?
January, with its average high-temperature of 28.4°F (-2°C) and an average low-temperature of 15.1°F (-9.4°C), holds the record as the coldest month.
What is the most humid month?
The most humid month is January, with an average relative humidity of 82%.
What is the driest month?
The month with the least rainfall in Griswold is January, when the rain falls for 3.8 days and typically collects 0.59" (15mm) of precipitation.
How many days does it rain?
In Griswold, during the entire year, the rain falls for 118.7 days and collects up to 20.79" (528mm) of precipitation.
When does it snow?
Months with snowfall are January through May, October through December.
How many days does it snow?
In Griswold, Iowa, during the entire year, snow falls for 32.3 days and aggregates up to 9.41" (239mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 4.5h of sunshine.
When is the lowest UV index?
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 7.7 days and accumulates 2.36" (60mm) of snow.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Griswold, 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.
What is the wettest month?
June is the month with the most rainfall. Rain falls for 16.4 days and accumulates 3.7" (94mm) of precipitation.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
June has the longest days of the year, with an average of 15h and 6min of daylight.
What is the month with the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What are the warmest months in Griswold?
July is the warmest month of the year in Griswold, registering average temperatures as high as 82.6°F (28.1°C) and as low as 65.1°F (18.4°C).
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.4h of sunshine.
What is the least humid month?
With an average relative humidity of 69%, October is the least humid month.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 18min of daylight.
Average temperature
Griswold, IA
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (28.4°F).
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure
Griswold, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed
Griswold, IA
- Average wind speed in January:
10.5mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9.1mph - Average wind speed in June:
8.4mph
- Average wind speed in July:
7.1mph - Average wind speed in August:
7.3mph - Average wind speed in September:
8.4mph - Average wind speed in October:
9.6mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity
Griswold, IA
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (69%).
Average rainfall
Griswold, IA
- Average rainfall in January:
0.59" - Average rainfall in February:
0.67" - Average rainfall in March:
1.14" - Average rainfall in April:
1.73" - Average rainfall in May:
3.15" - Average rainfall in June:
3.7"
- Average rainfall in July:
2.05" - Average rainfall in August:
2.48" - Average rainfall in September:
2.13" - Average rainfall in October:
1.42" - Average rainfall in November:
0.79" - Average rainfall in December:
0.94"
The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days
Griswold, IA
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
3.1 days - Average rainfall days in March:
9.3 days - Average rainfall days in April:
13.6 days - Average rainfall days in May:
16.2 days - Average rainfall days in June:
16.4 days
- Average rainfall days in July:
14 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
10.7 days - Average rainfall days in October:
8.6 days - Average rainfall days in November:
5.8 days - Average rainfall days in December:
4.4 days
The month with the highest number of rainy days is June (16.4 days).
The month with the least rainy days is February (3.1 days).
Average snowfall
Griswold, IA
- Average snowfall in January:
2.09" - Average snowfall in February:
2.36" - Average snowfall in March:
1.54" - Average snowfall in April:
0.59" - Average snowfall in May:
0.24" - Average snowfall in June:
0"
The month with the highest snowfall is February (2.36").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Griswold, IA
- Average snowfall days in January:
8.7 days - Average snowfall days in February:
7.7 days - Average snowfall days in March:
4.9 days - Average snowfall days in April:
1.3 days - Average snowfall days in May:
0.3 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:
0.5 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
6.4 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Griswold, IA
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 3min - Average sunshine in February:
5h and 1min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 5min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days
Griswold, IA
- Average sunshine days in January:
18.9 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
16.9 days - Average sunshine days in April:
14.3 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
12.6 days - Average sunshine days in August:
14.9 days - Average sunshine days in September:
16.6 days - Average sunshine days in October:
20.7 days - Average sunshine days in November:
20.7 days - Average sunshine days in December:
21.2 days
The month with the most sunshine days is December (21.2 days).
The month with the least sunshine days is June (10.8 days).
Average UV index
Griswold, IA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover
Griswold, IA
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility
Griswold, IA
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).
Griswold, Iowa, USA
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