Expand
Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Fairfax, Iowa, is another subzero cold winter month, with an average temperature fluctuating between 26.2°F (-3.2°C) and 14.2°F (-9.9°C). With an average high-temperature of 26.2°F (-3.2°C) and an average low-temperature of 14.2°F (-9.9°C), January is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Fairfax, Iowa, with an average temperature varying between 30.6°F (-0.8°C) and 17.6°F (-8°C). February reports an average high-temperature of a still subzero cold 30.6°F (-0.8°C), slightly varied from January's 26.2°F (-3.2°C). Weather in February »
Weather in March
March, the first month of the spring in Fairfax, is a frosty month, with an average temperature ranging between max 45.7°F (7.6°C) and min 30.6°F (-0.8°C). March's onset witnesses a marked shift in the average high-temperature, moving from a subzero cold 30.6°F (-0.8°C) in February to a frosty 45.7°F (7.6°C). Weather in March »
Weather in April
April is a mild spring month in Fairfax, Iowa, with an average temperature ranging between max 57.9°F (14.4°C) and min 41.4°F (5.2°C). April sees a rise in the average high-temperature, climbing from a frosty 45.7°F (7.6°C) in March to a refreshing 57.9°F (14.4°C). Weather in April »
Weather in May
May, the last month of the spring in Fairfax, is an agreeable month, with an average temperature varying between 52.3°F (11.3°C) and 68.9°F (20.5°C). May witnesses an increase in the average high-temperature, moving from a mild 57.9°F (14.4°C) in April to an agreeable 68.9°F (20.5°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Fairfax, Iowa, with temperature in the range of an average low of 61.5°F (16.4°C) and an average high of 78.1°F (25.6°C). Fairfax's weather shows a temperature rise with the arrival of June, moving from an agreeable 68.9°F (20.5°C) in May to a moderately hot 78.1°F (25.6°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Fairfax, Iowa, with temperature in the range of an average low of 64.6°F (18.1°C) and an average high of 80.8°F (27.1°C). July is the month when Fairfax sees the highest average temperatures, with a high of 80.8°F (27.1°C) and a low of 64.6°F (18.1°C). July's average heat index is estimated at a tropical 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Fairfax, is another warm month, with an average temperature ranging between min 62.1°F (16.7°C) and max 79.5°F (26.4°C). The transition from July to August sees an average high-temperature of a still warm 79.5°F (26.4°C), indicating a minor variance from the prior month. Weather in August »
Weather in September
September, the first month of the autumn in Fairfax, is still a warm month, with an average temperature varying between 74.3°F (23.5°C) and 55.2°F (12.9°C). Transitioning from August to September, Fairfax observes an average high-temperature of a still warm 74.3°F (23.5°C), differing subtly from the previous month. Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Fairfax, Iowa, with an average temperature fluctuating between 44.1°F (6.7°C) and 59.9°F (15.5°C). In October, the average high-temperature decreases considerably from a moderately hot 74.3°F (23.5°C) in September to a refreshing 59.9°F (15.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Fairfax, is also a frosty month, with an average temperature fluctuating between 32.2°F (0.1°C) and 45.5°F (7.5°C). As November begins, there is a noticeable decrease in the average high-temperature, falling from a mild 59.9°F (15.5°C) in October to a chilly 45.5°F (7.5°C). Weather in November »
Weather in December
December, the first month of the winter in Fairfax, is also an icy month, with an average temperature fluctuating between 22.5°F (-5.3°C) and 33.1°F (0.6°C). The arrival of December indicates a decrease in the average high-temperature, moving from a frosty 45.5°F (7.5°C) in November to an icy 33.1°F (0.6°C). Weather in December »
Updated: Aug 25, 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
What time of the year is the coldest?
The lowest temperatures are recorded in January, with averages reaching a high of 26.2°F (-3.2°C) and a low of 14.2°F (-9.9°C).
What is the most humid month?
The most humid month is January, with an average relative humidity of 85%.
What is the driest month in Fairfax?
January and February are months with the least rain when the rain falls for 4.2 days and typically aggregates up to 0.63" (16mm) of rain.
How many days does it rain?
In Fairfax, during the entire year, the rain falls for 120.7 days and collects up to 18.31" (465mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall in Fairfax.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 10.3 days and accumulates 2.64" (67mm) of snow.
How many days does it snow?
Throughout the year, there are 36.1 snowfall days, and 8.43" (214mm) of snow is accumulated.
What is the month with the least sunshine in Fairfax?
With an average of 4.1h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Fairfax, 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.
What is the rainiest month?
May is the month with the most rainfall. Rain falls for 16 days and accumulates 3.07" (78mm) of precipitation.
When it does not snow?
In Fairfax, snow does not fall in May through September.
When are the longest days?
The month with the longest days is June, with an average of 15h and 12min of daylight.
What are the months with the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What is the warmest month?
In Fairfax, July is identified by the average highest temperatures, reaching a peak of 80.8°F (27.1°C) and a low of 64.6°F (18.1°C).
What month has the most sunshine?
With an average of 10h of sunshine, July has the most sunshine of the year.
What is the least humid month?
October is the least humid month, with an average relative humidity of 73%.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Fairfax, IA
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (26.2°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 (14.2°F).
Average pressure
Fairfax, IA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Fairfax, IA
- Average wind speed in January:
10.7mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.5mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9.1mph - Average wind speed in June:
7.9mph
- Average wind speed in July:
7mph - Average wind speed in August:
7mph - Average wind speed in September:
8mph - Average wind speed in October:
9.7mph - Average wind speed in November:
10.5mph - Average wind speed in December:
10.1mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity
Fairfax, IA
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Fairfax, IA
- Average rainfall in January:
0.63" - Average rainfall in February:
0.63" - Average rainfall in March:
1.02" - Average rainfall in April:
2.09" - Average rainfall in May:
3.07" - Average rainfall in June:
2.6"
- Average rainfall in July:
2.24" - Average rainfall in August:
1.22" - Average rainfall in September:
1.73" - Average rainfall in October:
1.46" - Average rainfall in November:
0.83" - Average rainfall in December:
0.79"
The wettest month (with the highest rainfall) is May (3.07").
The driest months (with the least rainfall) are January and February (0.63").
Average rainfall days
Fairfax, IA
- Average rainfall days in January:
4.2 days - Average rainfall days in February:
3 days - Average rainfall days in March:
9.4 days - Average rainfall days in April:
13.2 days - Average rainfall days in May:
16 days - Average rainfall days in June:
15.3 days
- Average rainfall days in July:
14.8 days - Average rainfall days in August:
11.9 days - Average rainfall days in September:
10.9 days - Average rainfall days in October:
9.6 days - Average rainfall days in November:
6.5 days - Average rainfall days in December:
5.9 days
The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is February (3 days).
Average snowfall
Fairfax, IA
The month with the highest snowfall is January (2.64").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Fairfax, IA
- Average snowfall days in January:
10.3 days - Average snowfall days in February:
8.8 days - Average snowfall days in March:
4.5 days - Average snowfall days in April:
1.1 days - Average snowfall days in May:
0 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:
0.7 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
8.2 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Fairfax, IA
- Average daylight in January:
9h and 3min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
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 1min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Fairfax, IA
- Average sunshine days in January:
19.5 days - Average sunshine days in February:
16.8 days - Average sunshine days in March:
17.1 days - Average sunshine days in April:
14.4 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
11.8 days
- Average sunshine days in July:
12.8 days - Average sunshine days in August:
17 days - Average sunshine days in September:
18.2 days - Average sunshine days in October:
19.9 days - Average sunshine days in November:
19.3 days - Average sunshine days in December:
18.6 days
The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is June (11.8 days).
Average UV index
Fairfax, IA
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Fairfax, IA
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility
Fairfax, IA
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Fairfax, Iowa, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location