Climate and monthly weather forecast
Saint Marys, KS

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Weather in January

January, like December, in Saint Marys, Kansas, is another cold winter month, with an average temperature ranging between min 22.5°F (-5.3°C) and max 37.4°F (3°C). In Saint Marys, the lowest average temperatures are observed in January, with a high of 37.4°F (3°C) and a low of 22.5°F (-5.3°C). Weather in January »

Weather in February

February, the last month of the winter in Saint Marys, is also a wintry month, with an average temperature varying between 41.2°F (5.1°C) and 25.9°F (-3.4°C). A minor adjustment in Saint Marys's average high-temperature is noted with the start of February, touching a still cold 41.2°F (5.1°C) from January's 37.4°F (3°C). Weather in February »

Weather in March

March, the first month of the spring in Saint Marys, is a fresh month, with temperature in the range of an average high of 54.3°F (12.4°C) and an average low of 37°F (2.8°C). In Saint Marys, the onset of March comes with an increased average high-temperature, moving from February's icy 41.2°F (5.1°C) to a fresh 54.3°F (12.4°C). Weather in March »

Weather in April

April is a comfortable spring month in Saint Marys, Kansas, with an average temperature fluctuating between 45.1°F (7.3°C) and 64.4°F (18°C). April sees a temperature increase, moving from a fresh 54.3°F (12.4°C) in March to a comfortable 64.4°F (18°C). Weather in April »

Weather in May

The last month of the spring, May, is an agreeable month in Saint Marys, Kansas, with an average temperature varying between 55.4°F (13°C) and 73°F (22.8°C). A soft shift in the average high-temperature is noticeable in May, transitioning from an enjoyable 64.4°F (18°C) in April to a pleasant 73°F (22.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Saint Marys, Kansas, with temperature in the range of an average high of 84°F (28.9°C) and an average low of 66°F (18.9°C). The beginning of June signals a rise in the average high-temperature, moving from an agreeable 73°F (22.8°C) in May to a moderately hot 84°F (28.9°C). Weather in June »

Weather in July

July in Saint Marys, Kansas, is a hot summer month, with an average temperature varying between 88°F (31.1°C) and 68.7°F (20.4°C). In Saint Marys, the month of July registers the highest temperatures, averaging 88°F (31.1°C) at the peak and 68.7°F (20.4°C) at the lowest. Throughout July, the heat index is evaluated at a sweltering 100.4°F (38°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Saint Marys, Kansas, with an average temperature fluctuating between 65.8°F (18.8°C) and 85.8°F (29.9°C). The start of August sees the average high-temperature at a warm 85.8°F (29.9°C), showing little difference from July's 88°F (31.1°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Saint Marys, Kansas, with an average temperature ranging between max 78.8°F (26°C) and min 59.5°F (15.3°C). September brings a minor shift in the average high-temperature, adjusting from a moderately hot 85.8°F (29.9°C) in August to a still warm 78.8°F (26°C). Weather in September »

Weather in October

October, the same as September, is another enjoyable autumn month in Saint Marys, Kansas, with an average temperature varying between 65.5°F (18.6°C) and 47.5°F (8.6°C). October weather is marked by a drop in the average high-temperature, falling from a moderately hot 78.8°F (26°C) in September to a refreshing 65.5°F (18.6°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Saint Marys, Kansas, with an average temperature ranging between min 36.9°F (2.7°C) and max 53.1°F (11.7°C). A change in temperatures is noted as October gives way to November, with average highs reducing from a refreshing 65.5°F (18.6°C) to a fresh 53.1°F (11.7°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Saint Marys, Kansas, with an average temperature ranging between max 40.1°F (4.5°C) and min 26.2°F (-3.2°C). With December's arrival, Saint Marys's weather changes as the average high-temperature falls from a fresh 53.1°F (11.7°C) in November to a wintry 40.1°F (4.5°C). Weather in December »
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

The coldest temperatures occur during January, when averages reach a peak of 37.4°F (3°C) and a low of 22.5°F (-5.3°C).

What is the driest month?

The months with the least rainfall are January and December Rain falls for 3.5 days and accumulates 0.55" (14mm) of rain.

How many days does it rain?

In Saint Marys, during the entire year, the rain falls for 114.1 days and collects up to 20.67" (525mm) of precipitation.

When does it snow?

January through April, October through December are months with snowfall.

How many days does it snow?

Throughout the year, in Saint Marys, there are 17.9 snowfall days, and 6.61" (168mm) of snow is accumulated.

What is the month with the least sunshine?

The months with the least sunshine are January and December, with an average of 5.6h of sunshine.

When is the lowest UV index?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

When does it snow the most?

The month with the most snowfall is February, when snow falls for 4.9 days and typically aggregates up to 1.77" (45mm) of snow.

When is Daylight Saving Time (DST)?

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 most humid month?

The months with the highest humidity are May and June, with an average relative humidity of 76%.

What is the rainiest month?

The month with the most rainfall is May, when the rain falls for 15.2 days and typically aggregates up to 3.19" (81mm) of precipitation.

When it does not snow?

In Saint Marys, 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 14h and 54min of daylight.

What is the month with the most sunshine?

June and July, with an average of 10.7h of sunshine, are months with the most sunshine.

When is the highest UV index?

The month with the highest UV index is June, with an average maximum UV index of 7.

What is the hottest time of year?

Saint Marys's warmest month, July, registers temperatures that range from a high of 88°F (31.1°C) to a low of 68.7°F (20.4°C).

What is the least humid month?

The least humid month is October, with an average relative humidity of 66%.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

Average temperature
Saint Marys, KS

Average temperature - Saint Marys, KS

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (37.4°F).

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure
Saint Marys, KS

Average pressure - Saint Marys, KS

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

Average wind speed
Saint Marys, KS

Average wind speed - Saint Marys, KS

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).

Average humidity
Saint Marys, KS

Average humidity - Saint Marys, KS

The months with the highest relative humidity are May and June (76%).
The month with the lowest relative humidity is October (66%).

Average rainfall
Saint Marys, KS

Average rainfall - Saint Marys, KS

The wettest month (with the highest rainfall) is May (3.19").
The driest months (with the least rainfall) are January and December (0.55").

Average rainfall days
Saint Marys, KS

Average rainfall days - Saint Marys, KS

The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (3.5 days).

Average snowfall
Saint Marys, KS

Average snowfall - Saint Marys, KS

The month with the highest snowfall is February (1.77").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days
Saint Marys, KS

Average snowfall days - Saint Marys, KS

The month with the highest number of snowfall days is February (4.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Saint Marys, KS

Average daylight / Average sunshine - Saint Marys, KS

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).

Average sunshine days
Saint Marys, KS

Average sunshine days - Saint Marys, KS

The month with the most sunshine days is December (23.6 days).
The month with the least sunshine days is May (13.4 days).

Average UV index
Saint Marys, KS

Average UV index - Saint Marys, KS

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average visibility
Saint Marys, KS

Average visibility - Saint Marys, KS

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, Kansas, USA

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