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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, the same as December, in Delta, Iowa, is another subzero cold winter month, with temperature in the range of an average high of 28.6°F and an average low of 15.6°F. Delta's temperature records reveal January as the coldest month, marked by average highs of 28.6°F and lows of 15.6°F. Weather in January »
Weather in February
The last month of the winter, February, is an icy month in Delta, Iowa, with temperature in the range of an average high of 32.5°F and an average low of 19°F. The onset of February notes an average high-temperature of a wintry 32.5°F, subtly shifted from January's 28.6°F. Weather in February »
Weather in March
March, the first month of the spring in Delta, is a frosty month, with an average temperature fluctuating between 47.1°F and 32.4°F. Delta's transition into March marks a considerable rise in the average high-temperature, moving up from an icy 32.5°F in February to a frosty 47.1°F. Weather in March »
Weather in April
April is a refreshing spring month in Delta, Iowa, with an average temperature varying between 59.5°F and 42.4°F. April comes with an increase, with the average high-temperature moving from a frosty 47.1°F in March to a refreshing 59.5°F. Weather in April »
Weather in May
May, the last month of the spring in Delta, is an agreeable month, with an average temperature ranging between max 70°F and min 53.2°F. Delta sees an increase in average high-temperatures during May, moving from a mild 59.5°F in April to an agreeable 70°F. Weather in May »
Weather in June
June, the first month of the summer in Delta, is a warm month, with an average temperature ranging between max 79.3°F and min 63.1°F. With the transition into June, Delta experiences an increase in average high-temperatures, moving up from a pleasant 70°F in May to a warm 79.3°F. Weather in June »
Weather in July
July, the same as June, is another warm summer month in Delta, Iowa, with an average temperature varying between 65.1°F and 82°F. In Delta, July is identified by the highest average temperatures, reaching a peak of 82°F and a low of 65.1°F. The average heat index in July is evaluated at a tropical 89.6°F. Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Delta, Iowa, with an average temperature varying between 81.1°F and 62.8°F. Delta measures an average high-temperature of a still warm 81.1°F in August, nearly consistent with the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Delta, is still a warm month, with an average temperature varying between 56.3°F and 75.2°F. Transition into September subtly marks a drop in the average high-temperature, moderately moving from a warm 81.1°F in August to a still moderately hot 75.2°F. Weather in September »
Weather in October
October, like September, in Delta, Iowa, is another refreshing autumn month, with an average temperature ranging between max 61.3°F and min 44.8°F. October's arrival coincides with a drop in the average high-temperature, decreasing from September's warm 75.2°F to a comfortable 61.3°F. Weather in October »
Weather in November
November, the last month of the autumn in Delta, is another chilly month, with an average temperature fluctuating between 46.9°F and 33.4°F. With the onset of November, Delta's average high-temperature witnesses a clear drop, receding from October's enjoyable 61.3°F to a chilly 46.9°F. Weather in November »
Weather in December
December, the first month of the winter in Delta, is also an icy month, with an average temperature fluctuating between 34.7°F and 23.4°F. The shift from November to December involves a decrease in the average high-temperature, from a chilly 46.9°F to a wintry 34.7°F. Weather in December »
[Resources]Frequently asked questions
What month is the coldest in Delta?
Temperature records in Delta mark January as the coldest month, with highs averaging 28.6°F and lows at 15.6°F.
How many days does it rain in Delta?
In Delta, Iowa, during the entire year, the rain falls for 137.9 days and collects up to 27.76" of precipitation.
When does it snow in Delta?
January through May, October through December are months with snowfall.
What is the snowiest month in Delta?
The month with the most snowfall in Delta, Iowa, is January, when snow falls for 9.5 days and typically aggregates up to 4.06" of snow.
How much does it snow in Delta?
Throughout the year, there are 32.8 snowfall days, and 12.56" of snow is accumulated.
What is the month with the least sunshine in Delta?
The month with the least sunshine is January, with an average of 4.2h of sunshine.
What is the month with the lowest UV index in Delta?
The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2.
What is the driest month in Delta?
February is the month with the least rainfall in Delta. Rain falls for 4.9 days and accumulates 0.98" of precipitation.
When is Daylight Saving Time (DST) in Delta?
On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from CDT to CST.
What is the rainiest month in Delta?
The month with the most rainfall in Delta is May, when the rain falls for 17.7 days and typically aggregates up to 4.17" of precipitation.
When it does not snow in Delta?
June through September are months without snowfall.
When are the longest days in Delta?
The month with the longest days in Delta, Iowa, is June, with an average of 15h and 6min of daylight.
What are the months with the highest UV index in Delta?
June and July, with an average maximum UV index of 6, are months with the highest UV index in Delta, Iowa.
What is the warmest month in Delta?
The warmest period in Delta tends to be July, when average temperatures fluctuate between a high of 82°F and a low of 65.1°F.
What is the most humid month in Delta?
With an average relative humidity of 83%, July is the most humid month.
What month has the most sunshine in Delta?
July has the most sunshine of the year in Delta, with an average of 10.3h of sunshine.
What is the least humid month in Delta?
The least humid month in Delta, Iowa, is October, with an average relative humidity of 72%.
What is the month with the shortest days in Delta?
December has the shortest days of the year in Delta, with an average of 9h and 18min of daylight.
Average temperature
Delta, IA
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (28.6°F).
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure
Delta, IA
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.89"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:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Delta, IA
- Average wind speed in January:
10.7mph - Average wind speed in February:
10.5mph - Average wind speed in March:
10.5mph - Average wind speed in April:
10.6mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
7mph - Average wind speed in August:
6.9mph - Average wind speed in September:
8mph - Average wind speed in October:
9.6mph - Average wind speed in November:
10.4mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity
Delta, IA
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Delta, IA
- Average rainfall in January:
1.06" - Average rainfall in February:
0.98" - Average rainfall in March:
1.97" - Average rainfall in April:
2.87" - Average rainfall in May:
4.17" - Average rainfall in June:
4.02"
- Average rainfall in July:
2.76" - Average rainfall in August:
2.24" - Average rainfall in September:
2.76" - Average rainfall in October:
2.2" - Average rainfall in November:
1.54" - Average rainfall in December:
1.18"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days
Delta, IA
- Average rainfall days in January:
5.8 days - Average rainfall days in February:
4.9 days - Average rainfall days in March:
11 days - Average rainfall days in April:
14.7 days - Average rainfall days in May:
17.7 days - Average rainfall days in June:
17.2 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
12.1 days - Average rainfall days in October:
11.3 days - Average rainfall days in November:
8.3 days - Average rainfall days in December:
6.8 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (4.9 days).
Average snowfall
Delta, IA
- Average snowfall in January:
4.06" - Average snowfall in February:
3.66" - Average snowfall in March:
1.34" - Average snowfall in April:
0.79" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Delta, IA
- Average snowfall days in January:
9.5 days - Average snowfall days in February:
8.4 days - Average snowfall days in March:
4.6 days - Average snowfall days in April:
0.8 days - Average snowfall days in May:
0.1 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:
0.5 days - Average snowfall days in November:
2.4 days - Average snowfall days in December:
6.5 days
The month with the highest number of snowfall days is January (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Delta, IA
- Average daylight in January:
9h and 4min - 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 3min - 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 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 5min - 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 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Delta, IA
- Average sunshine days in January:
16.6 days - Average sunshine days in February:
15.6 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
12.5 days - Average sunshine days in May:
11 days - Average sunshine days in June:
10.3 days
- Average sunshine days in July:
11.9 days - Average sunshine days in August:
15.5 days - Average sunshine days in September:
15.9 days - Average sunshine days in October:
17.9 days - Average sunshine days in November:
18.7 days - Average sunshine days in December:
19.1 days
The month with the most sunshine days is December (19.1 days).
The month with the least sunshine days is June (10.3 days).
Average UV index
Delta, 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
Delta, IA
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility
Delta, 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).
Delta, Iowa, USA
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