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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, like December, is another subzero cold winter month in Grand Junction, Iowa, with an average temperature fluctuating between 13.5°F (-10.3°C) and 26.8°F (-2.9°C). Grand Junction's January weather reaches an average high of 26.8°F (-2.9°C) and an average low of 13.5°F (-10.3°C), making it the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Grand Junction, is another freezing cold month, with an average temperature fluctuating between 30.6°F (-0.8°C) and 16.9°F (-8.4°C). Grand Junction notes an average high-temperature of a still freezing cold 30.6°F (-0.8°C) in February, hardly diverging from January. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Grand Junction, Iowa, with an average temperature varying between 46°F (7.8°C) and 31.1°F (-0.5°C). As Grand Junction welcomes March, there is a noticeable shift in the average high-temperature, escalating from February's subzero cold 30.6°F (-0.8°C) to a frosty 46°F (7.8°C). Weather in March »
Weather in April
April is a refreshing spring month in Grand Junction, Iowa, with temperature in the range of an average high of 58.5°F (14.7°C) and an average low of 42.1°F (5.6°C). The commencement of April sees a shift in the average high-temperature, moving from a frosty 46°F (7.8°C) in March to a refreshing 58.5°F (14.7°C). Weather in April »
Weather in May
May, the last month of the spring in Grand Junction, is an agreeable month, with an average temperature fluctuating between 53.1°F (11.7°C) and 69.4°F (20.8°C). The commencement of May sees a shift in the average high-temperature, moving from a refreshing 58.5°F (14.7°C) in April to a pleasant 69.4°F (20.8°C). Weather in May »
Weather in June
June, the first month of the summer in Grand Junction, is a moderately hot month, with an average temperature fluctuating between 62.8°F (17.1°C) and 79.3°F (26.3°C). June's onset is marked by a temperature increase, moving from an agreeable 69.4°F (20.8°C) in May to a moderately hot 79.3°F (26.3°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Grand Junction, Iowa, with an average temperature fluctuating between 64.6°F (18.1°C) and 82°F (27.8°C). In Grand Junction, the average temperatures in July are the highest, with a peak at 82°F (27.8°C) and a low of 64.6°F (18.1°C). July's average heat index is evaluated at a tropical 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Grand Junction, is also a moderately hot month, with an average temperature fluctuating between 80.1°F (26.7°C) and 61.5°F (16.4°C). As Grand Junction steps into August, the average high-temperature is measured at a still warm 80.1°F (26.7°C), displaying minor differences from July's 82°F (27.8°C). Weather in August »
Weather in September
September, the first month of the autumn in Grand Junction, is still a warm month, with an average temperature ranging between max 74.8°F (23.8°C) and min 55.8°F (13.2°C). The onset of September notes an average high-temperature of a still warm 74.8°F (23.8°C), subtly shifted from August's 80.1°F (26.7°C). Weather in September »
Weather in October
October, the same as September, in Grand Junction, Iowa, is another mild autumn month, with an average temperature ranging between max 59.9°F (15.5°C) and min 43.9°F (6.6°C). The shift from September to October brings a noticeable decrease in the average high-temperature, dropping from a moderately hot 74.8°F (23.8°C) to a mild 59.9°F (15.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Grand Junction, is another chilly month, with an average temperature fluctuating between 32.5°F (0.3°C) and 45.9°F (7.7°C). In the transition to November, Grand Junction observes a drop in the average high-temperature, moving from a moderate 59.9°F (15.5°C) in October to a frosty 45.9°F (7.7°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Grand Junction, Iowa, with temperature in the range of an average low of 21°F (-6.1°C) and an average high of 32°F (0°C). During Grand Junction's transition into December, the average high-temperature lessens, moving from a frosty 45.9°F (7.7°C) in November to a cold 32°F (0°C). Weather in December »
Updated: Feb 12, 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 is the coldest time of year in Grand Junction?
January is the month that records the lowest temperatures in Grand Junction, with averages ranging from a high of 26.8°F (-2.9°C) to a low of 13.5°F (-10.3°C).
What is the most humid month in Grand Junction?
January is the most humid month, with an average relative humidity of 84%.
What is the driest month in Grand Junction?
January is the month with the least rainfall. Rain falls for 3.8 days and accumulates 0.87" (22mm) of precipitation.
How many days does it rain in Grand Junction?
Throughout the year, there are 125.7 rainfall days, and 26.5" (673mm) of precipitation is accumulated.
When does it snow in Grand Junction?
Months with snowfall are January through May, October through December.
What is the snowiest month in Grand Junction?
The month with the most snowfall is January, when snow falls for 9.8 days and typically aggregates up to 4.29" (109mm) of snow.
How many days does it snow in Grand Junction?
Throughout the year, in Grand Junction, Iowa, there are 38.1 snowfall days, and 15.31" (389mm) of snow is accumulated.
What is the month with the least sunshine in Grand Junction?
With an average of 4.2h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in Grand Junction?
The months with the lowest UV index in Grand Junction, Iowa, are January, February, October through December, with an average maximum UV index of 2.
When is Daylight Saving Time (DST) in Grand Junction?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Grand Junction, 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 wettest month in Grand Junction?
The month with the most rainfall in Grand Junction, Iowa, is May, when the rain falls for 16.2 days and typically aggregates up to 4.06" (103mm) of precipitation.
When it does not snow in Grand Junction?
In Grand Junction, snow does not fall in June through September.
When are the longest days in Grand Junction?
The month with the longest days in Grand Junction is June, with an average of 15h and 12min of daylight.
When is the highest UV index in Grand Junction?
June and July, with an average maximum UV index of 6, are months with the highest UV index in Grand Junction, Iowa.
What part of the year is the hottest in Grand Junction?
In Grand Junction, July is known for its average highest temperatures, reaching a high of 82°F (27.8°C) and a low of 64.6°F (18.1°C).
What month has the most sunshine in Grand Junction?
The month with the most sunshine in Grand Junction, Iowa, is July, with an average of 10.2h of sunshine.
What is the least humid month in Grand Junction?
October is the least humid month in Grand Junction, with an average relative humidity of 69%.
What is the month with the shortest days in Grand Junction?
December has the shortest days of the year in Grand Junction, with an average of 9h and 12min of daylight.
Average temperature
Grand Junction, IA
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (26.8°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 (13.5°F).
Average pressure
Grand Junction, 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:
29.93"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:
29.96"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.08"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
Grand Junction, IA
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9.1mph - Average wind speed in June:
8.3mph
- Average wind speed in July:
7.1mph - Average wind speed in August:
7.1mph - Average wind speed in September:
8.3mph - Average wind speed in October:
9.6mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10.2mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity
Grand Junction, IA
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (69%).
Average rainfall
Grand Junction, IA
- Average rainfall in January:
0.87" - Average rainfall in February:
1.02" - Average rainfall in March:
1.54" - Average rainfall in April:
2.76" - Average rainfall in May:
4.06" - Average rainfall in June:
3.94"
- Average rainfall in July:
2.28" - Average rainfall in August:
2.44" - Average rainfall in September:
2.91" - Average rainfall in October:
2.2" - Average rainfall in November:
1.14" - Average rainfall in December:
1.34"
The wettest month (with the highest rainfall) is May (4.06").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days
Grand Junction, IA
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
3.4 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
14.7 days - Average rainfall days in May:
16.2 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
14.1 days - Average rainfall days in August:
13 days - Average rainfall days in September:
11.2 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
6.9 days - Average rainfall days in December:
4.8 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is February (3.4 days).
Average snowfall
Grand Junction, IA
- Average snowfall in January:
4.29" - Average snowfall in February:
3.66" - Average snowfall in March:
1.89" - Average snowfall in April:
1.26" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Grand Junction, IA
- Average snowfall days in January:
9.8 days - Average snowfall days in February:
8.8 days - Average snowfall days in March:
5.2 days - Average snowfall days in April:
1.7 days - Average snowfall days in May:
0.3 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:
3.4 days - Average snowfall days in December:
8.3 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Grand Junction, 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 5min - Average sunshine in March:
5h and 5min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
9h and 4min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Grand Junction, IA
- Average sunshine days in January:
18.1 days - Average sunshine days in February:
16.5 days - Average sunshine days in March:
16 days - Average sunshine days in April:
12.9 days - Average sunshine days in May:
13.3 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
14.3 days - Average sunshine days in August:
16.3 days - Average sunshine days in September:
17.2 days - Average sunshine days in October:
19.2 days - Average sunshine days in November:
19.4 days - Average sunshine days in December:
18.8 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is June (11.1 days).
Average UV index
Grand Junction, IA
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).
Average cloud cover
Grand Junction, IA
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and September (Cloud cover 30).
Average visibility
Grand Junction, IA
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).
Grand Junction, Iowa, USA
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