Climate and monthly weather forecast
Saint Johns, AZ

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Weather in January

January, the same as December, in Saint Johns, Arizona, is a frosty winter month, with temperature in the range of an average low of 28.2°F (-2.1°C) and an average high of 45.5°F (7.5°C). With an average high-temperature of 45.5°F (7.5°C) and an average low-temperature of 28.2°F (-2.1°C), January is the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Saint Johns, is a fresh month, with an average temperature ranging between min 31.5°F (-0.3°C) and max 50.7°F (10.4°C). As Saint Johns transitions into February, the average high-temperature stands at a fresh 50.7°F (10.4°C), offering little variation from the preceding month. Weather in February »

Weather in March

The first month of the spring, March, is a mild month in Saint Johns, Arizona, with an average temperature varying between 38.1°F (3.4°C) and 59.5°F (15.3°C). March sees a marginal temperature increase, moving from a fresh 50.7°F (10.4°C) in February to a refreshing 59.5°F (15.3°C). Weather in March »

Weather in April

April is a refreshing spring month in Saint Johns, Arizona, with an average temperature varying between 66.2°F (19°C) and 43°F (6.1°C). April witnesses a subtle temperature ascent, adjusting from a refreshing 59.5°F (15.3°C) in March to a comfortable 66.2°F (19°C). Weather in April »

Weather in May

The last month of the spring, May, is a warm month in Saint Johns, Arizona, with an average temperature varying between 74.1°F (23.4°C) and 50.2°F (10.1°C). The embrace of May brings a minor uplift in the average high-temperature, shifting from a comfortable 66.2°F (19°C) in April to a moderately hot 74.1°F (23.4°C). Weather in May »

Weather in June

The first month of the summer, June, is a hot month in Saint Johns, Arizona, with an average temperature fluctuating between 86.5°F (30.3°C) and 61.2°F (16.2°C). June and July are characterised by peak temperatures, with an average high of 86.5°F (30.3°C). Weather in June »

Weather in July

July, the same as June, in Saint Johns, Arizona, is another hot summer month, with an average temperature varying between 86.5°F (30.3°C) and 66.6°F (19.2°C). June and July represent the warmest period, with an average high-temperature of 86.5°F (30.3°C). Weather in July »

Weather in August

August, the last month of the summer in Saint Johns, is also a moderately hot month, with an average temperature varying between 65.1°F (18.4°C) and 84.7°F (29.3°C). The onset of August brings with it an average high-temperature of a warm 84.7°F (29.3°C), showing a negligible variation from the month before. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Saint Johns, Arizona, with temperature in the range of an average low of 59.2°F (15.1°C) and an average high of 79.5°F (26.4°C). September's advent notes a subtle adjustment in average high-temperature to a still warm 79.5°F (26.4°C) from August. Weather in September »

Weather in October

October, the same as September, in Saint Johns, Arizona, is another pleasant autumn month, with an average temperature ranging between max 68.2°F (20.1°C) and min 46.9°F (8.3°C). Transition from September to October is accompanied by a temperature drop, with average high-temperatures decreasing from a warm 79.5°F (26.4°C) to a pleasant 68.2°F (20.1°C). Weather in October »

Weather in November

November, the last month of the autumn in Saint Johns, is another mild month, with temperature in the range of an average low of 36.3°F (2.4°C) and an average high of 57.4°F (14.1°C). Saint Johns's average high-temperature decreases in November, falling from an agreeable 68.2°F (20.1°C) in October to a moderate 57.4°F (14.1°C). Weather in November »

Weather in December

December, the first month of the winter in Saint Johns, is also a frosty month, with an average temperature varying between 29.1°F (-1.6°C) and 46.6°F (8.1°C). During the transition into December, Saint Johns observes a decrease in the average high-temperature, falling from a refreshing 57.4°F (14.1°C) in November to a frosty 46.6°F (8.1°C). Weather in December »
Updated: Aug 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year?

Saint Johns experiences its average lowest temperatures in January, reaching a peak of 45.5°F (7.5°C) and a minimum of 28.2°F (-2.1°C).

What is the most humid month?

January is the most humid month, with an average relative humidity of 61%.

How many days does it rain?

In Saint Johns, during the entire year, the rain falls for 67.8 days and collects up to 6.34" (161mm) of precipitation.

When does it snow?

Months with snowfall in Saint Johns are January through April, November and December.

How many days does it snow?

In Saint Johns, during the entire year, snow falls for 14.9 days and aggregates up to 7.87" (200mm) of snow.

What are the months with the lowest UV index?

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

What is the snowiest month?

The month with the most snowfall is February, when snow falls for 3.1 days and typically aggregates up to 2.44" (62mm) of snow.

What is the driest month?

The months with the least rainfall are May and June Rain falls for 4.3 days and accumulates 0.28" (7mm) of rain.

When it does not snow?

May through October are months without snowfall in Saint Johns, Arizona.

What is the warmest month?

June and July represent the warmest period, with an average high-temperature of 86.5°F (30.3°C).

What is the least humid month?

June is the least humid month, with an average relative humidity of 21%.

When are the longest days?

June has the longest days of the year, with an average of 14h and 24min of daylight.

What is the month with the highest UV index?

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

What is the rainiest month?

July is the month with the most rainfall. Rain falls for 10.2 days and accumulates 0.83" (21mm) of precipitation.

What month has the most sunshine?

With an average of 12.2h of sunshine, August has the most sunshine of the year.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 54min of daylight.

Is there Daylight Saving Time (DST)?

Saint Johns, Arizona, does not observe Daylight Saving Time (DST). MST timezone is used over the entire year.

What is the month with the least sunshine?

December has the least sunshine of the year, with an average of 7h of sunshine.

Average temperature
Saint Johns, AZ

Average temperature - Saint Johns, AZ

The warmest months (with the highest average high temperature) are June and July (86.5°F).
The month with the lowest average high temperature is January (45.5°F).

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).

Average pressure
Saint Johns, AZ

Average pressure - Saint Johns, AZ

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
Saint Johns, AZ

Average wind speed - Saint Johns, AZ

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is January (6.2mph).

Average humidity
Saint Johns, AZ

Average humidity - Saint Johns, AZ

The month with the highest relative humidity is January (61%).
The month with the lowest relative humidity is June (21%).

Average rainfall
Saint Johns, AZ

Average rainfall - Saint Johns, AZ

The wettest month (with the highest rainfall) is July (0.83").
The driest months (with the least rainfall) are May and June (0.28").

Average rainfall days
Saint Johns, AZ

Average rainfall days - Saint Johns, AZ

The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is November (2.9 days).

Average snowfall
Saint Johns, AZ

Average snowfall - Saint Johns, AZ

The month with the highest snowfall is February (2.44").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Saint Johns, AZ

Average snowfall days - Saint Johns, AZ

The month with the highest number of snowfall days is December (4.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Saint Johns, AZ

Average daylight / Average sunshine - Saint Johns, AZ

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

The month with the most sunshine is August (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).

Average sunshine days
Saint Johns, AZ

Average sunshine days - Saint Johns, AZ

The month with the most sunshine days is June (25.8 days).
The month with the least sunshine days is July (17.4 days).

Average UV index
Saint Johns, AZ

Average UV index - Saint Johns, AZ

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

Average visibility
Saint Johns, AZ

Average visibility - Saint Johns, AZ

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 Johns, Arizona, USA

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