September weather forecast
Colo, IA

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Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Colo, IA

Average temperature in September - Colo, IA
  • Average high temperature in September: 74.7°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (26.2°F).

  • Average low temperature in September: 55.6°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).

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Average pressure in September
Colo, IA

Average pressure in September - Colo, IA
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in September
Colo, IA

Average wind speed in September - Colo, IA
  • Average wind speed in September: 8.3mph

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

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Average humidity in September
Colo, IA

Average humidity in September - Colo, IA
  • Average humidity in September: 76%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in September
Colo, IA

Average rainfall in September - Colo, IA
  • Average rainfall in September: 2.91"

The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is January (0.91").

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Average rainfall days in September
Colo, IA

Average rainfall days in September - Colo, IA
  • Average rainfall days in September: 10.6 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (3.8 days).

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Average snowfall in September
Colo, IA

Average snowfall in September - Colo, IA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (3.94").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Colo, IA

Average snowfall days in September - Colo, IA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Colo, IA

Average daylight in September / Average sunshine in September - Colo, IA
  • Average daylight in September: 12h and 3min

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 September: 9h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in September
Colo, IA

Average sunshine days in September - Colo, IA
  • Average sunshine days in September: 17.4 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (10.6 days).

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Average UV index in September
Colo, IA

Average UV index in September - Colo, IA
  • Average UV index in September: 4

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

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Average cloud cover in September
Colo, IA

Average cloud cover in September - Colo, IA
  • Average cloud cover in September: 31

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 31).

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Average visibility in September
Colo, IA

Average visibility in September - Colo, IA
  • Average visibility in September: 6mi

The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).

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Colo, Iowa, USA

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