August weather - Summer 2025

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (26.6°F).

Average low temperature in August: 61.9°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).

Average pressure in August
Charlotte, IA

Average pressure in August: 29.97"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 in August
Charlotte, IA

Average wind speed in August: 6.6mph

The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity in August
Charlotte, IA

Average humidity in August: 80%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).

Average rainfall in August
Charlotte, IA

Average rainfall in August: 1.73"

The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is February (1.26").

Average rainfall days in August
Charlotte, IA

Average rainfall days in August: 12.7 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is February (5.3 days).

Average snowfall in August
Charlotte, IA

Average snowfall in August: 0"

The month with the highest snowfall is January (5.2").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Charlotte, IA

Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Charlotte, IA

Average daylight in August: 13h and 5min

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 August: 9h and 5min

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).

Average sunshine days in August
Charlotte, IA

Average sunshine days in August: 16.7 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (10.7 days).

Average UV index in August
Charlotte, IA

Average UV index in August: 5

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in August
Charlotte, IA

Average cloud cover in August: 30

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).

Average visibility in August
Charlotte, IA

Average visibility in August: 6mi

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).