Climate and monthly weather forecastNorwalk, IA
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Norwalk, Iowa, with an average temperature ranging between min 15.1°F (-9.4°C) and max 28.2°F (-2.1°C). January is Norwalk's coldest month, registering average high temperatures of 28.2°F (-2.1°C) and lows of 15.1°F (-9.4°C). Weather in January »Weather in February
The last month of the winter, February, is a cold month in Norwalk, Iowa, with an average temperature varying between 18°F (-7.8°C) and 32.4°F (0.2°C). The average high-temperature in February, at a wintry 32.4°F (0.2°C), reveals a modest deviation from January's 28.2°F (-2.1°C). Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Norwalk, Iowa, with an average temperature fluctuating between 47.5°F (8.6°C) and 32.2°F (0.1°C). An increase in the average high-temperature marks March, surging from February's icy 32.4°F (0.2°C) to a chilly 47.5°F (8.6°C). Weather in March »Weather in April
April is a refreshing spring month in Norwalk, Iowa, with temperature in the range of an average low of 42.4°F (5.8°C) and an average high of 59.7°F (15.4°C). April's onset brings a temperature rise, moving from a chilly 47.5°F (8.6°C) in March to a moderate 59.7°F (15.4°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Norwalk, Iowa, with temperature in the range of an average low of 53.1°F (11.7°C) and an average high of 69.6°F (20.9°C). May's arrival coincides with a rise in the average high-temperature, moving from April's moderate 59.7°F (15.4°C) to an agreeable 69.6°F (20.9°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Norwalk, Iowa, with temperature in the range of an average high of 79.5°F (26.4°C) and an average low of 62.8°F (17.1°C). The start of June brings a rise in the average high-temperature, moving from a pleasant 69.6°F (20.9°C) in May to a moderately hot 79.5°F (26.4°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Norwalk, Iowa, with an average temperature varying between 65.5°F (18.6°C) and 83.1°F (28.4°C). Norwalk's warmest month, July, registers temperatures that range from a high of 83.1°F (28.4°C) to a low of 65.5°F (18.6°C). The heat index in July is calculated to be a hot 91.4°F (33°C). Weather in July »Weather in August
August, the last month of the summer in Norwalk, is another warm month, with an average temperature fluctuating between 81.7°F (27.6°C) and 62.6°F (17°C). Norwalk experiences an average high-temperature of a still warm 81.7°F (27.6°C) in August, subtly different from July's 83.1°F (28.4°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Norwalk, Iowa, with temperature in the range of an average low of 55.9°F (13.3°C) and an average high of 75.6°F (24.2°C). The average high-temperature slightly decreases in September, shifting from 81.7°F (27.6°C) in August to a still warm 75.6°F (24.2°C). Weather in September »Weather in October
October, like September, is another mild autumn month in Norwalk, Iowa, with an average temperature ranging between max 60.6°F (15.9°C) and min 45°F (7.2°C). Norwalk witnesses a significant decrease in the average high-temperature with the arrival of October, falling from September's moderately hot 75.6°F (24.2°C) to a refreshing 60.6°F (15.9°C). Weather in October »Weather in November
November, the last month of the autumn in Norwalk, is another chilly month, with temperature in the range of an average low of 32.7°F (0.4°C) and an average high of 47.1°F (8.4°C). Norwalk's progression into November involves a drop in the average high-temperature, receding from a mild 60.6°F (15.9°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 Norwalk, is still a cold month, with an average temperature varying between 34.2°F (1.2°C) and 22.5°F (-5.3°C). December weather is marked by a drop in the average high-temperature, falling from a chilly 47.1°F (8.4°C) in November to a wintry 34.2°F (1.2°C). Weather in December »Updated: Jul 6, 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 brings the lowest temperatures, with an average high of 28.2°F (-2.1°C) and an average low of 15.1°F (-9.4°C).
January and June, with an average relative humidity of 82%, are most humid months.
January is the month with the least rainfall. Rain falls for 4 days and accumulates 0.47" (12mm) of precipitation.
Throughout the year, there are 114.4 rainfall days, and 16.38" (416mm) of precipitation is accumulated.
January through May, October through December are months with snowfall.
The month with the most snowfall is January, when snow falls for 8.7 days and typically aggregates up to 2.24" (57mm) of snow.
Throughout the year, there are 30.9 snowfall days, and 7.36" (187mm) of snow is accumulated.
The month with the least sunshine is January, with an average of 4.3h of sunshine.
January is the month with the lowest UV index, 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 month with the most rainfall is May, when the rain falls for 15.3 days and typically aggregates up to 2.76" (70mm) of precipitation.
In Norwalk, snow does not fall in June through September.
June has the longest days of the year, with an average of 15h and 6min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
In Norwalk, the peak average temperatures are observed in July, with a high of 83.1°F (28.4°C) and a low of 65.5°F (18.6°C).
The month with the most sunshine is July, with an average of 10.3h of sunshine.
October is the least humid month, with an average relative humidity of 70%.
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Norwalk, IA
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (28.2°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
Norwalk, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Norwalk, IA
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.8mph - Average wind speed in June:
8mph
The windiest months (with the highest average wind speed) are January, February, March and April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity
Norwalk, IA
The months with the highest relative humidity are January and June (82%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Norwalk, IA
- Average rainfall in January:
0.47" - Average rainfall in February:
0.51" - Average rainfall in March:
1.02" - Average rainfall in April:
1.46" - Average rainfall in May:
2.76" - Average rainfall in June:
2.64"
- Average rainfall in July:
1.5" - Average rainfall in August:
1.85" - Average rainfall in September:
1.73" - Average rainfall in October:
1.18" - Average rainfall in November:
0.71" - Average rainfall in December:
0.55"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days
Norwalk, IA
- Average rainfall days in January:
4 days - Average rainfall days in February:
3 days - Average rainfall days in March:
8.7 days - Average rainfall days in April:
13.4 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
15.9 days
- Average rainfall days in July:
12.9 days - Average rainfall days in August:
11.8 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
6.3 days - Average rainfall days in December:
4.1 days
The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (3 days).
Average snowfall
Norwalk, IA
- Average snowfall in January:
2.24" - Average snowfall in February:
2.2" - Average snowfall in March:
0.98" - Average snowfall in April:
0.35" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Norwalk, IA
- Average snowfall days in January:
8.7 days - Average snowfall days in February:
7.8 days - Average snowfall days in March:
4.6 days - Average snowfall days in April:
1.1 days - Average snowfall days in May:
0.2 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 days - Average snowfall days in October:
0.6 days - Average snowfall days in November:
2.2 days - Average snowfall days in December:
5.7 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
Norwalk, IA
- Average daylight in January:
9h and 36min - 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 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - 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 54min - Average daylight in December:
9h and 12min
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 12min).
- Average sunshine in January:
4h and 18min - Average sunshine in February:
4h and 48min - Average sunshine in March:
6h and 0min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 36min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 18min - Average sunshine in October:
5h and 36min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Norwalk, IA
- Average sunshine days in January:
20.3 days - Average sunshine days in February:
17.8 days - Average sunshine days in March:
18 days - Average sunshine days in April:
15.1 days - Average sunshine days in May:
12.4 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
15.5 days - Average sunshine days in August:
16.7 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
21.2 days - Average sunshine days in November:
21.9 days - Average sunshine days in December:
22.3 days
The month with the most sunshine days is December (22.3 days).
The month with the least sunshine days is June (12.2 days).
Average UV index
Norwalk, IA
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Norwalk, IA
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and September (Cloud cover 29).
Average visibility
Norwalk, 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).
