July weather forecastGrafton, IA
July
Weather in July
July, like June, in Grafton, Iowa, is a moderately hot summer month, with an average temperature varying between 62.6°F (17°C) and 79.2°F (26.2°C).Temperature
July, with its average high-temperature of 79.2°F (26.2°C) and an average low-temperature of 62.6°F (17°C), holds the record as the warmest month.Humidity
In July, the average relative humidity is 83%.Rainfall
In Grafton, in July, it is raining for 16.3 days, with typically 2.64" (67mm) of accumulated precipitation. Throughout the year, there are 134.3 rainfall days, and 25.08" (637mm) of precipitation is accumulated.Snowfall
In Grafton, snow does not fall in June through September.Daylight
In July, the average length of the day in Grafton is 15h and 1min.On the first day of the month, sunrise is at 5:36 am and sunset at 8:56 pm. On the last day of July, sunrise is at 6:02 am and sunset at 8:35 pm CDT.
Sunshine
With an average of 9.8h of sunshine, July has the most sunshine of the year.UV index
The months with the highest UV index are June and July, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A typical high UV index of 6 in July suggests the following recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Grafton, IA
- Average high temperature in July: 79.2°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (21.6°F).
- Average low temperature in July: 62.6°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in July
Grafton, IA
- Average pressure in July: 29.96"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in July
Grafton, IA
- Average wind speed in July: 7.4mph
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 (7.4mph).
Average humidity in July
Grafton, IA
- Average humidity in July: 83%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and October (72%).
Average rainfall in July
Grafton, IA
- Average rainfall in July: 2.64"
The wettest month (with the highest rainfall) is June (4.13").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in July
Grafton, IA
- Average rainfall days in July: 16.3 days
The month with the highest number of rainy days is June (18.4 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in July
Grafton, IA
- Average snowfall in July: 0"
The month with the highest snowfall is February (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
Grafton, IA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Grafton, IA
- Average daylight in July: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in July: 9h and 48min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in July
Grafton, IA
- Average sunshine days in July: 11.4 days
The month with the most sunshine days is October (18.1 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in July
Grafton, IA
- Average UV index in July: 6
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in July
Grafton, IA
- Average cloud cover in July: 34
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in July
Grafton, IA
- Average visibility in July: 5mi
The months with the highest visibility are March, April, May, June, September, October and November (6mi).
The months with the lowest visibility are January, February, July, August and December (5mi).
