Climate and monthly weather forecastDelaware, IA
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Delaware, Iowa, with an average temperature fluctuating between 11.7°F (-11.3°C) and 24.3°F (-4.3°C). In Delaware, the lowest average temperatures are observed in January, with a high of 24.3°F (-4.3°C) and a low of 11.7°F (-11.3°C). Weather in January »Weather in February
The last month of the winter, February, is another freezing cold month in Delaware, Iowa, with temperature in the range of an average low of 15.1°F (-9.4°C) and an average high of 27.9°F (-2.3°C). With the advent of February, Delaware experiences an average high-temperature of a still freezing cold 27.9°F (-2.3°C), mirroring a close resemblance to the previous month. Weather in February »Weather in March
March, the first month of the spring in Delaware, is a chilly month, with an average temperature ranging between min 28.8°F (-1.8°C) and max 43°F (6.1°C). The onset of March witnesses a clear shift in the average high-temperature, escalating from a freezing cold 27.9°F (-2.3°C) in February to a chilly 43°F (6.1°C). Weather in March »Weather in April
April in Delaware, Iowa, is a refreshing spring month, with an average temperature varying between 39°F (3.9°C) and 55.8°F (13.2°C). April's arrival brings a temperature shift, moving from a frosty 43°F (6.1°C) in March to a moderate 55.8°F (13.2°C). Weather in April »Weather in May
May, the last month of the spring in Delaware, is a comfortable month, with an average temperature fluctuating between 66.9°F (19.4°C) and 50.5°F (10.3°C). May sees a rise in the average high-temperature, climbing from a mild 55.8°F (13.2°C) in April to a comfortable 66.9°F (19.4°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Delaware, Iowa, with an average temperature varying between 76.6°F (24.8°C) and 59.9°F (15.5°C). In Delaware, stepping into June brings a temperature increase, moving up from May's enjoyable 66.9°F (19.4°C) to a moderately hot 76.6°F (24.8°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Delaware, Iowa, with an average temperature ranging between min 63°F (17.2°C) and max 79.3°F (26.3°C). July stands out as Delaware's warmest month, with an average high-temperature of 79.3°F (26.3°C) and a low-temperature of 63°F (17.2°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Delaware, Iowa, with an average temperature fluctuating between 78.3°F (25.7°C) and 60.4°F (15.8°C). In August, Delaware's weather conditions record an average high-temperature of a still warm 78.3°F (25.7°C), demonstrating little divergence from the preceding month. Weather in August »Weather in September
September, the first month of the autumn in Delaware, is also an agreeable month, with an average temperature fluctuating between 53.2°F (11.8°C) and 72.3°F (22.4°C). A subtle shift in Delaware's weather is observed as August turns into September, with the average high temperature reducing from a moderately hot 78.3°F (25.7°C) to a pleasant 72.3°F (22.4°C). Weather in September »Weather in October
October, like September, is another mild autumn month in Delaware, Iowa, with temperature in the range of an average low of 42.6°F (5.9°C) and an average high of 58.1°F (14.5°C). October brings a decrease in the average high-temperature, shifting from an agreeable 72.3°F (22.4°C) in September to a refreshing 58.1°F (14.5°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Delaware, Iowa, with temperature in the range of an average low of 30.7°F (-0.7°C) and an average high of 43.7°F (6.5°C). The arrival of November brings a significant change in Delaware's weather, with average high-temperatures dropping from October's mild 58.1°F (14.5°C) to a frosty 43.7°F (6.5°C). Weather in November »Weather in December
December, the first month of the winter in Delaware, is still a freezing cold month, with an average temperature varying between 31.1°F (-0.5°C) and 20.5°F (-6.4°C). A subtle decrease in the average high-temperature marks December, falling from November's frosty 43.7°F (6.5°C) to a subzero cold 31.1°F (-0.5°C). Weather in December »Updated: Aug 9, 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 coldest month is January, with an average high-temperature of 24.3°F (-4.3°C) and an average low-temperature of 11.7°F (-11.3°C).
With an average relative humidity of 88%, January is the most humid month.
In Delaware, during the entire year, the rain falls for 111.7 days and collects up to 13.31" (338mm) of precipitation.
Months with snowfall are January through April, October through December.
The month with the most snowfall is January, when snow falls for 10.8 days and typically aggregates up to 2.13" (54mm) of snow.
Throughout the year, in Delaware, there are 39.4 snowfall days, and 6.81" (173mm) of snow is accumulated.
The month with the least sunshine is January, with an average of 3.5h of sunshine.
The months with the lowest UV index 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.
The months with the lowest humidity are April and October, with an average relative humidity of 75%.
May is the month with the most rainfall. Rain falls for 14.9 days and accumulates 2.13" (54mm) of precipitation.
May through September are months without snowfall.
May through August, with an average maximum UV index of 5, are months with the highest UV index.
June has the longest days of the year, with an average of 15h and 12min of daylight.
In Delaware, the average highest temperatures are observed in July, with a high of 79.3°F (26.3°C) and a low of 63°F (17.2°C).
July and August, with an average of 9.6h of sunshine, are months with the most sunshine in Delaware.
December is the month with the least rainfall. Rain falls for 4.5 days and accumulates 0.47" (12mm) of precipitation.
With an average of 9h and 6min of daylight, December has the shortest days of the year.
Average temperature
Delaware, IA
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.3°F).
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure
Delaware, IA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Delaware, IA
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.5mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.1mph
- Average wind speed in July:
7.1mph - Average wind speed in August:
7.1mph - Average wind speed in September:
8.2mph - Average wind speed in October:
9.8mph - Average wind speed in November:
10.5mph - Average wind speed in December:
10.2mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity
Delaware, IA
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall
Delaware, IA
- Average rainfall in January:
0.55" - Average rainfall in February:
0.55" - Average rainfall in March:
0.79" - Average rainfall in April:
1.38" - Average rainfall in May:
2.13" - Average rainfall in June:
1.77"
- Average rainfall in July:
1.65" - Average rainfall in August:
0.94" - Average rainfall in September:
1.3" - Average rainfall in October:
1.06" - Average rainfall in November:
0.71" - Average rainfall in December:
0.47"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is December (0.47").
Average rainfall days
Delaware, IA
- Average rainfall days in January:
3.1 days - Average rainfall days in February:
2.6 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
12.9 days - Average rainfall days in May:
14.9 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
13.5 days - Average rainfall days in August:
10.6 days - Average rainfall days in September:
8.9 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
6.4 days - Average rainfall days in December:
4.5 days
The month with the highest number of rainy days is June (15.4 days).
The month with the least rainy days is February (2.6 days).
Average snowfall
Delaware, IA
The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Delaware, IA
- Average snowfall days in January:
10.8 days - Average snowfall days in February:
9.2 days - Average snowfall days in March:
5 days - Average snowfall days in April:
1.9 days - Average snowfall days in May:
0 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:
0.8 days - Average snowfall days in November:
2.9 days - Average snowfall days in December:
8.8 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Delaware, IA
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - 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 48min - Average daylight in December:
9h and 6min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
3h and 30min - Average sunshine in February:
3h and 42min - Average sunshine in March:
5h and 54min - Average sunshine in April:
7h and 0min - Average sunshine in May:
8h and 6min - Average sunshine in June:
9h and 12min
- Average sunshine in July:
9h and 36min - Average sunshine in August:
9h and 36min - Average sunshine in September:
8h and 54min - Average sunshine in October:
5h and 12min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 0min
The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days
Delaware, IA
- Average sunshine days in January:
19.4 days - Average sunshine days in February:
16.7 days - Average sunshine days in March:
16.8 days - Average sunshine days in April:
13.9 days - Average sunshine days in May:
12.9 days - Average sunshine days in June:
11.7 days
- Average sunshine days in July:
13.3 days - Average sunshine days in August:
17.2 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
19.7 days
The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is June (11.7 days).
Average UV index
Delaware, IA
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover
Delaware, IA
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility
Delaware, IA
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
