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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 Saint Marys, Iowa, is a freezing cold winter month, with temperature in the range of an average low of 15.3°F (-9.3°C) and an average high of 28.8°F (-1.8°C). Saint Marys's coldest month, January, generally records average temperatures ranging from a high of 28.8°F (-1.8°C) to a low of 15.3°F (-9.3°C). Weather in January »
Weather in February
The last month of the winter, February, is a cold month in Saint Marys, Iowa, with an average temperature varying between 32.5°F (0.3°C) and 18.5°F (-7.5°C). Entering February, Saint Marys's average high-temperature reads a cold 32.5°F (0.3°C), indicating a close resemblance to the previous month's climate. Weather in February »
Weather in March
March, the first month of the spring in Saint Marys, is a frosty month, with an average temperature fluctuating between 47.8°F (8.8°C) and 32.5°F (0.3°C). The shift into March brings a noticeable increase in the average high-temperature, soaring from a wintry 32.5°F (0.3°C) in February to a frosty 47.8°F (8.8°C). Weather in March »
Weather in April
April is a mild spring month in Saint Marys, Iowa, with temperature in the range of an average high of 59.9°F (15.5°C) and an average low of 42.4°F (5.8°C). April's arrival signals an increase in average high-temperatures, moving from March's frosty 47.8°F (8.8°C) to a mild 59.9°F (15.5°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Saint Marys, Iowa, with an average temperature ranging between min 52.9°F (11.6°C) and max 69.6°F (20.9°C). With the arrival of May, the average high-temperature transitions from a moderate 59.9°F (15.5°C) in April to an agreeable 69.6°F (20.9°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Saint Marys, Iowa, with an average temperature varying between 79.7°F (26.5°C) and 63.1°F (17.3°C). Saint Marys in June sees a temperature change, with average high-temperatures moving from a pleasant 69.6°F (20.9°C) in May to a warm 79.7°F (26.5°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Saint Marys, Iowa, with an average temperature varying between 65.7°F (18.7°C) and 83.1°F (28.4°C). Saint Marys's July weather reaches an average high of 83.1°F (28.4°C) and an average low of 65.7°F (18.7°C), making it the warmest month. The heat index value for July is evaluated at a hot 91.4°F (33°C). Weather in July »
Weather in August
August, the last month of the summer in Saint Marys, is another warm month, with an average temperature fluctuating between 81.3°F (27.4°C) and 62.6°F (17°C). Saint Marys marks the onset of August with an average high-temperature of a still warm 81.3°F (27.4°C), subtly divergent from July's 83.1°F (28.4°C). Weather in August »
Weather in September
September, the first month of the autumn in Saint Marys, is still a warm month, with an average temperature ranging between max 75.7°F (24.3°C) and min 55.9°F (13.3°C). September signifies a gentle decline in Saint Marys's average high-temperature, easing from 81.3°F (27.4°C) in August to a still moderately hot 75.7°F (24.3°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Saint Marys, Iowa, with an average temperature fluctuating between 44.6°F (7°C) and 60.8°F (16°C). The onset of October marks a clear decrease in the average high-temperature, dropping from a moderately hot 75.7°F (24.3°C) in September to a comfortable 60.8°F (16°C). Weather in October »
Weather in November
November, the last month of the autumn in Saint Marys, is another chilly month, with temperature in the range of an average low of 32.7°F (0.4°C) and an average high of 47.5°F (8.6°C). A decrease in the average high-temperature is observed during November, shifting from a comfortable 60.8°F (16°C) in October to a chilly 47.5°F (8.6°C). Weather in November »
Weather in December
December, the first month of the winter in Saint Marys, is still a cold month, with temperature in the range of an average high of 34.7°F (1.5°C) and an average low of 22.8°F (-5.1°C). In December, the average high-temperature decreases from a frosty 47.5°F (8.6°C) in November to an icy 34.7°F (1.5°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest month in Saint Marys?
With average high temperatures of 28.8°F (-1.8°C) and lows of 15.3°F (-9.3°C), January is the coldest month in Saint Marys, Iowa.
What are the most humid months in Saint Marys?
The months with the highest humidity are January and June, with an average relative humidity of 82%.
How much does it rain in Saint Marys?
Throughout the year, in Saint Marys, Iowa, there are 118.9 rainfall days, and 18.62" (473mm) of precipitation is accumulated.
When does it snow in Saint Marys?
Months with snowfall in Saint Marys are January through May, October through December.
How much does it snow in Saint Marys?
In Saint Marys, Iowa, during the entire year, snow falls for 31.9 days and aggregates up to 10.12" (257mm) of snow.
What is the month with the least sunshine in Saint Marys?
January has the least sunshine of the year in Saint Marys, with an average of 4.3h of sunshine.
When is the lowest UV index in Saint Marys?
With an average maximum UV index of 1, January is the month with the lowest UV index.
When does it snow the most in Saint Marys?
February is the month with the most snowfall. Snow falls for 8.2 days and accumulates 3.03" (77mm) of snow.
When is Daylight Saving Time (DST) in Saint Marys?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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 in Saint Marys?
The month with the most rainfall in Saint Marys, Iowa, is May, when the rain falls for 15.9 days and typically aggregates up to 3.07" (78mm) of precipitation.
When it does not snow in Saint Marys?
June through September are months without snowfall.
When are the longest days in Saint Marys?
With an average of 15h and 6min of daylight, June has the longest days of the year.
When is the highest UV index in Saint Marys?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Saint Marys, Iowa.
What part of the year is the hottest in Saint Marys?
Saint Marys, Iowa, notes the warmest temperatures in July, with a average high of 83.1°F (28.4°C) and a low of 65.7°F (18.7°C).
What month has the most sunshine in Saint Marys?
The month with the most sunshine in Saint Marys, Iowa, is July, with an average of 10.4h of sunshine.
What is the least humid month in Saint Marys?
October is the least humid month, with an average relative humidity of 71%.
What is the driest month in Saint Marys?
December is the month with the least rainfall in Saint Marys. Rain falls for 4.7 days and accumulates 0.55" (14mm) of precipitation.
What is the month with the shortest days in Saint Marys?
The month with the shortest days in Saint Marys is December, with an average of 9h and 18min of daylight.
Average temperature
Saint Marys, IA
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure
Saint Marys, 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:
29.92"Hg - Average pressure in May:
29.93"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:
30.01"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"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 (29.89"Hg).
Average wind speed
Saint Marys, IA
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.8mph - Average wind speed in June:
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:
9.4mph - Average wind speed in November:
10.2mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity
Saint Marys, IA
The months with the highest relative humidity are January and June (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Saint Marys, IA
- Average rainfall in January:
0.63" - Average rainfall in February:
0.67" - Average rainfall in March:
1.22" - Average rainfall in April:
1.81" - Average rainfall in May:
3.07" - Average rainfall in June:
2.99"
- Average rainfall in July:
1.85" - Average rainfall in August:
2.01" - Average rainfall in September:
1.81" - Average rainfall in October:
1.1" - Average rainfall in November:
0.91" - Average rainfall in December:
0.55"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is December (0.55").
Average rainfall days
Saint Marys, IA
- Average rainfall days in January:
3.4 days - Average rainfall days in February:
3.8 days - Average rainfall days in March:
9.5 days - Average rainfall days in April:
13 days - Average rainfall days in May:
15.9 days - Average rainfall days in June:
15.9 days
- Average rainfall days in July:
14.3 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
11.1 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
6 days - Average rainfall days in December:
4.7 days
The months with the highest number of rainy days are May and June (15.9 days).
The month with the least rainy days is January (3.4 days).
Average snowfall
Saint Marys, IA
- Average snowfall in January:
2.99" - Average snowfall in February:
3.03" - Average snowfall in March:
1.42" - Average snowfall in April:
0.63" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is February (3.03").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Saint Marys, IA
- Average snowfall days in January:
9.7 days - Average snowfall days in February:
8.2 days - Average snowfall days in March:
4.6 days - Average snowfall days in April:
0.9 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:
0.6 days - Average snowfall days in November:
2.1 days - Average snowfall days in December:
5.7 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Saint Marys, 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 2min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 1min - 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Saint Marys, IA
- Average sunshine days in January:
19.5 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
16.6 days - Average sunshine days in April:
14.7 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
11 days
- Average sunshine days in July:
13.2 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
17 days - Average sunshine days in October:
19.6 days - Average sunshine days in November:
21.4 days - Average sunshine days in December:
21.9 days
The month with the most sunshine days is December (21.9 days).
The month with the least sunshine days is June (11 days).
Average UV index
Saint Marys, IA
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Saint Marys, IA
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility
Saint Marys, IA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Saint Marys, Iowa, USA
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