Climate and monthly weather forecastOnawa, IA
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Onawa, Iowa, with an average temperature ranging between min 15.1°F (-9.4°C) and max 28°F (-2.2°C). January, with an average high of 28°F (-2.2°C) and a low of 15.1°F (-9.4°C), signifies the coldest month of the year. Weather in January »Weather in February
The last month of the winter, February, is a wintry month in Onawa, Iowa, with an average temperature fluctuating between 32.2°F (0.1°C) and 18.3°F (-7.6°C). The shift into February reveals an average high-temperature of a wintry 32.2°F (0.1°C), closely mirroring January's climate. Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Onawa, Iowa, with temperature in the range of an average high of 47.8°F (8.8°C) and an average low of 31.8°F (-0.1°C). Onawa sees a considerable increase in average high-temperatures during March, surging from a cold 32.2°F (0.1°C) in February to a chilly 47.8°F (8.8°C). Weather in March »Weather in April
April in Onawa, Iowa, is a mild spring month, with an average temperature varying between 59.4°F (15.2°C) and 42.1°F (5.6°C). As March transitions into April, a change in temperatures is observed, with average highs moving from a frosty 47.8°F (8.8°C) to a refreshing 59.4°F (15.2°C). Weather in April »Weather in May
May, the last month of the spring in Onawa, is an agreeable month, with an average temperature fluctuating between 53.2°F (11.8°C) and 70.3°F (21.3°C). The transition from April to May brings a temperature rise, with average high-temperatures increasing from a refreshing 59.4°F (15.2°C) to an agreeable 70.3°F (21.3°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Onawa, Iowa, with an average temperature varying between 80.2°F (26.8°C) and 63.1°F (17.3°C). As Onawa enters June, the average high-temperature increases from the an agreeable 70.3°F (21.3°C) of May to a warm 80.2°F (26.8°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Onawa, Iowa, with an average temperature ranging between min 65.5°F (18.6°C) and max 83.8°F (28.8°C). July brings the highest temperatures, with an average high of 83.8°F (28.8°C) and an average low of 65.5°F (18.6°C). The heat index value during July is calculated to be a tropical 91.4°F (33°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Onawa, Iowa, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 82°F (27.8°C). August brings an average high-temperature of a still warm 82°F (27.8°C), nearly identical to the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Onawa, Iowa, with temperature in the range of an average high of 76.1°F (24.5°C) and an average low of 56.3°F (13.5°C). Onawa observes a small decrease in the average high-temperature with the arrival of September, falling from August's warm 82°F (27.8°C) to a still moderately hot 76.1°F (24.5°C). Weather in September »Weather in October
October, like September, is a moderate autumn month in Onawa, Iowa, with an average temperature ranging between max 60.6°F (15.9°C) and min 44.4°F (6.9°C). The shift from September to October sees a distinct decrease in the average high-temperature, dropping from a warm 76.1°F (24.5°C) to a refreshing 60.6°F (15.9°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Onawa, Iowa, with an average temperature fluctuating between 47.3°F (8.5°C) and 32.7°F (0.4°C). Transition into November marks a drop in the average high-temperature, moving from a moderate 60.6°F (15.9°C) in October to a chilly 47.3°F (8.5°C). Weather in November »Weather in December
The first month of the winter, December, is also a wintry month in Onawa, Iowa, with temperature in the range of an average high of 32.2°F (0.1°C) and an average low of 20.3°F (-6.5°C). In December, the meteorological conditions markedly change with the average high-temperature descending from a frosty 47.3°F (8.5°C) in November to a wintry 32.2°F (0.1°C). Weather in December »Updated: Feb 12, 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
Onawa's coldest month, January, generally records average temperatures ranging from a high of 28°F (-2.2°C) to a low of 15.1°F (-9.4°C).
January is the most humid month, with an average relative humidity of 82%.
The month with the least rainfall is January, when the rain falls for 2.9 days and typically collects 0.67" (17mm) of precipitation.
Throughout the year, in Onawa, there are 117.6 rainfall days, and 21.89" (556mm) of precipitation is accumulated.
Months with snowfall in Onawa, Iowa, are January through April, October through December.
Throughout the year, there are 32.9 snowfall days, and 11.69" (297mm) of snow is accumulated.
The month with the least sunshine in Onawa is January, with an average of 4.4h of sunshine.
The month with the most snowfall in Onawa, Iowa, is February, when snow falls for 7.5 days and typically aggregates up to 3.03" (77mm) of snow.
February and December, with an average maximum UV index of 1, are months with the lowest UV index.
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 66%.
The month with the most rainfall in Onawa is May, when the rain falls for 16.6 days and typically aggregates up to 3.31" (84mm) of precipitation.
May through September are months without snowfall in Onawa.
With an average of 15h and 12min of daylight, June has the longest days of the year.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
July is the warmest month, with an average high-temperature of 83.8°F (28.8°C) and an average low-temperature of 65.5°F (18.6°C).
With an average of 10.6h of sunshine, July has the most sunshine of the year.
December has the shortest days of the year in Onawa, Iowa, with an average of 9h and 12min of daylight.
Average temperature
Onawa, IA
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (28°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 (15.1°F).
Average pressure
Onawa, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.15"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:
29.86"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.95"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"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 (29.86"Hg).
Average wind speed
Onawa, IA
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.7mph
- Average wind speed in July:
7.4mph - Average wind speed in August:
7.7mph - Average wind speed in September:
8.8mph - Average wind speed in October:
9.9mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity
Onawa, IA
The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are April and October (66%).
Average rainfall
Onawa, IA
- Average rainfall in January:
0.67" - Average rainfall in February:
0.83" - Average rainfall in March:
1.38" - Average rainfall in April:
2.17" - Average rainfall in May:
3.31" - Average rainfall in June:
3.15"
- Average rainfall in July:
1.77" - Average rainfall in August:
2.28" - Average rainfall in September:
2.05" - Average rainfall in October:
2.05" - Average rainfall in November:
0.83" - Average rainfall in December:
1.42"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days
Onawa, IA
- Average rainfall days in January:
2.9 days - Average rainfall days in February:
2.7 days - Average rainfall days in March:
8.9 days - Average rainfall days in April:
13.4 days - Average rainfall days in May:
16.6 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
12.6 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
10.4 days - Average rainfall days in November:
5.5 days - Average rainfall days in December:
3.5 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (2.7 days).
Average snowfall
Onawa, IA
The month with the highest snowfall is February (3.03").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Onawa, IA
- Average snowfall days in January:
8.9 days - Average snowfall days in February:
7.5 days - Average snowfall days in March:
4.5 days - Average snowfall days in April:
1.5 days - Average snowfall days in May:
0.1 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:
0.9 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
7 days
The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Onawa, 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 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
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 12min).
- Average sunshine in January:
4h and 24min - Average sunshine in February:
5h and 18min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 54min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
9h and 48min - Average sunshine in September:
8h and 54min - Average sunshine in October:
6h and 6min - Average sunshine in November:
5h and 48min - Average sunshine in December:
4h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Onawa, IA
- Average sunshine days in January:
19.4 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
17.9 days - Average sunshine days in April:
14 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
15.6 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
16.4 days - Average sunshine days in October:
19 days - Average sunshine days in November:
21.5 days - Average sunshine days in December:
20.7 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (12 days).
Average UV index
Onawa, IA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover
Onawa, IA
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility
Onawa, 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).
