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Contents
- The climate of Mount Lemmon
- The best time to visit Mount Lemmon
- The worst time to visit Mount Lemmon
- Spring weather in Mount Lemmon
- Summer weather in Mount Lemmon
- Autumn weather in Mount Lemmon
- Winter weather in Mount Lemmon
- 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 rainfall
- Average rainfall days
- Average snowfall
- Average daylight
- Average sunshine
Mount Lemmon Ski Valley from atop the Mount Lemmon, Arizona
The climate of Mount Lemmon
Situated in Arizona, USA, Mount Lemmon features a BSh - subtropical steppe, according to the Köppen Climate Classification. It reveals a dry, hot climate with mild winter months and moderate rainfall throughout the year.
Annual climatic fluctuation is significant with temperatures varying from a balmy 76.5°F (24.7°C) at their highest in July to a cool 21.8°F (-5.7°C) at their lowest in February. Rainfall also sees a varied pattern, with the wettest period set between July and September, when it receives 4.4in to 7in precipitation, and the driest months being April and May with rainfall barely reaching 0.3in to 0.5in.
Noteworthy are the snowfall conditions which primarily occur from December to February, with the heaviest being 20.4in in February, tapering off dramatically to nil from April onwards. The amount of daylight through the year fluctuates noticeably between 13.8 hours in May and 10.1 hours in December. In contrast, sunshine hours remain relatively constant from 7.8 hours in January and December to 12.4 hours at their peak in June.
Annual climatic fluctuation is significant with temperatures varying from a balmy 76.5°F (24.7°C) at their highest in July to a cool 21.8°F (-5.7°C) at their lowest in February. Rainfall also sees a varied pattern, with the wettest period set between July and September, when it receives 4.4in to 7in precipitation, and the driest months being April and May with rainfall barely reaching 0.3in to 0.5in.
Noteworthy are the snowfall conditions which primarily occur from December to February, with the heaviest being 20.4in in February, tapering off dramatically to nil from April onwards. The amount of daylight through the year fluctuates noticeably between 13.8 hours in May and 10.1 hours in December. In contrast, sunshine hours remain relatively constant from 7.8 hours in January and December to 12.4 hours at their peak in June.
The best time to visit Mount Lemmon
The optimal time for visiting Mount Lemmon is contingent on personal preference regarding whether to experience the kindest temperatures or enjoy the sunniest days. If seeking moderate temperatures, October stands as the ideal month, with maximum temperatures averaging around 70.4°F (21.3°C) and minimum temperatures averaging 45.1°F (7.3°C). Rainfall at this time is relatively low at 3.1in, providing an ideal mix of warm temperatures and limited rainfall. Daylight lasts around 11.4 hours, while sunshine graces Mount Lemmon residents for approximately 9.7 hours daily.
The worst time to visit Mount Lemmon
Mount Lemmon should ideally be avoided in August, which is not only the wettest month of the year (with an impressive 7in of rainfall) but is also the month with the couple highest average temperatures of 73.6°F (23.1°C). The possibility of torrential rains, coupled with the less comfortable climate due to high temperatures, makes this month the least suitable for visiting. However, if snow is the deterrent, February ranks as the worst time for a visit, witnessing a substantial snowfall of 20.4in.
Spring weather in Mount Lemmon
Spring mounts an intriguing transition from colder to milder months in Mount Lemmon. March sees a high average temperature of 52.9°F (11.6°C), which ascends to 60.8°F (16°C) in April and then to a warm 69.1°F (20.6°C) in May. The lower temperature averages are less striking, with March at 25.7°F (-3.5°C), April at 31.7°F (-0.2°C), and May at 36.6°F (2.6°C). The rainfall during this period is also relatively low, ranging from 1.2in in March, to 0.5in in April, and 0.3in in May.
Summer weather in Mount Lemmon
Summer in Mount Lemmon exhibits hotter temperatures alongside escalating precipitation. The high temperatures go from 76.4°F (24.7°C) in June to 76.5°F (24.7°C) in July and 73.6°F (23.1°C) in August. The lower temperature averages range from 44.4°F (6.9°C) in June, 49.8°F (9.9°C) in July and August. An increase in rainfall through these months is also observed, reaching 0.6in in June, 4.4in in July and peaking at 7in in August.
Autumn weather in Mount Lemmon
Autumn in Mount Lemmon brings a cooling pattern alongside decreasing rainfall. The high temperatures drop from 70.4°F (21.3°C) in September to 61.7°F (16.5°C) in October, and further to 56.3°F (13.5°C) in November. At the same time, lower temperatures fall from 45.1°F (7.3°C) in September to 36.4°F (2.4°C) in October and 29.7°F (-1.3°C) in November. Rainfall during these months reduces significantly to 3.4in in September, 3.1in in October, and 1.8in in November.
Winter weather in Mount Lemmon
Winter continues the cooling trend in Mount Lemmon with a reemergence of snowfall. December sees high temperatures averaging 50.6°F (10.3°C), falling to 49.2°F (9.6°C) in January and further down to 48.3°F (9.1°C) in February. Lower temperatures also decrease from 24.3°F (-4.3°C) in December to 22.8°F (-5.1°C) in January and 21.8°F (-5.7°C) in February. These temperatures facilitate snow events with snowfall recorded at 11in in December, 16.5in in January, and peaking at 20.4in in February.
Weather in January
Monthly weather in Mount Lemmon, Arizona starts off the year with a chilled note. High altitude and location in Southwestern USA characterize January with potential for significant snowfall. Snow blankets the ground, accumulating from 16.5" (419mm), offering an ideal destination for winter sports enthusiasts. Weather in January »
Weather in February
Despite being placed in the heart of winter, February in Mount Lemmon shares a surprising trait with a typical spring month - a noticeable rise in temperature. February sees a gradual transition towards spring, although the weather remains generally cold. Weather in February »
Weather in March
As spring begins to announce itself, March weather in Mount Lemmon anticipates an onset of milder temperatures. Instead of snowfall, traces of rain begin to appear. A significant change in the weather is marked by a decrease in snowfall to 6.8" (173mm). Weather in March »
Weather in April
April in Mount Lemmon, Arizona denotes a more considerable shift in weather patterns, making room for the upcoming summer months. The weather is charitably mild, resulting in comfortable outdoor activities. A considerably reduced average of snowfall down to 2" (51mm) marks April as it transcends from colder, snow-covered times of March. Weather in April »
Weather in May
May in Mount Lemmon inaugurates a complete transition from the grasp of winters to the warmth of summers. The weather eases up, bidding farewell to snow and welcoming more daylight hours. No trace of snowfall is evident, marking the transition towards a full-fledged summer cycle. Weather in May »
Weather in June
The climatic conditions of Mount Lemmon in June undoubtedly synchronizes with the arrival of summer. Embracing plentiful sunshine, the weather becomes conducive for outdoor recreation. Even the rainfall is minimal, staying constant at 0.6" (15mm), predicting a dry spell ahead. Weather in June »
Weather in July
July is the heartbeat of summer in Mount Lemmon, with temperatures peaking and the environment pulsating with vibrancy. Rainfall also makes a comeback while holding onto warm summer days. The month becomes notably humid, with rainfall shooting up to 4.4" (112mm). Weather in July »
Weather in August
August in Mount Lemmon remains under the dominion of summer. Catering to its warmest temperatures, it also accommodates the most significant rainfall of the year. An immense increase is witnessed, with rainfall quantities reaching a peak at 7" (178mm). Weather in August »
Weather in September
September signifies the beginning of departure from summers in Mount Lemmon, Arizona, with a gradual cool-off in temperatures. Despite this, clear skies and abundant sunshine remain a constant. Maintaining warmth, the monthly rainfall drops significantly to 3.4" (86mm), marking transition towards a dry period. Weather in September »
Weather in October
Fall descends upon Mount Lemmon in October, with temperatures continuing to drop and the environment basking in autumn hues. The weather takes a significantly cooler turn, providing relief from the intense summer. In comparison, rainfall recedes to 3.1" (79mm), signaling a more relaxed weather progression. Weather in October »
Weather in November
November in Mount Lemmon ushers in a unique blend of autumn and the precursory notes of winter. The weather starts taking a colder slant, preparing for the year-end chill, with rainfall falling to 1.8" (46mm). With December, the first snowflakes will make their appearance, shifting away dramatically from October's vibrant fall palette. Weather in November »
Weather in December
December weather in Mount Lemmon, Arizona, encapsulates the arrival of the year-end winter cycle. With temperatures dropping to their yearly lows, the environment exudes a cozy, holiday spirit. Snowfall plays a major role, accumulating to 11" (279mm) and transforming the landscape into a winter wonderland. Weather in December »
Updated: Aug 17, 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
How many days does it rain?
In Mount Lemmon, during the entire year, the rain falls for 59 days and collects up to 29.57" (751mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall in Mount Lemmon.
How much does it snow?
In Mount Lemmon, during the entire year, snow aggregates up to 64.92" (1649mm).
What are the months with the least sunshine?
January and December, with an average of 7.8h of sunshine, are months with the least sunshine.
What part of the year is the coldest?
February stands out as Mount Lemmon's coldest month, with temperatures ranging between an average high of 48.4°F (9.1°C) and a low of 21.7°F (-5.7°C).
When does it snow the most?
February is the month with the most snowfall, with 20.39" (518mm) of accumulated snow.
What is the driest month?
May is the month with the least rainfall. Rain falls for 2 days and accumulates 0.24" (6mm) of precipitation.
When it does not snow?
In Mount Lemmon, snow does not fall in May through September.
What are the warmest months?
The highest point of temperatures falls in June and July, when the average high-temperature ascends to 76.5°F (24.7°C).
When are the longest days?
The month with the longest days is June, with an average of 14h and 12min of daylight.
What month has the most sunshine?
With an average of 12.4h of sunshine, June has the most sunshine of the year.
What is the wettest month?
August is the month with the most rainfall in Mount Lemmon. Rain falls for 11 days and accumulates 7.01" (178mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 10h and 6min of daylight.
Is there Daylight Saving Time (DST)?
Mount Lemmon does not observe Daylight Saving Time (DST). MST timezone is used throughout the entire year.
Average temperature
Mount Lemmon, AZ
The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is February (48.3°F).
The months with the highest average low temperature are July and August (49.8°F).
The coldest month (with the lowest average low temperature) is February (21.8°F).
Average rainfall
Mount Lemmon, AZ
The wettest month (with the highest rainfall) is August (7").
The driest month (with the least rainfall) is May (0.3").
Average rainfall days
Mount Lemmon, AZ
- Average rainfall days in January:
5 days - Average rainfall days in February:
5 days - Average rainfall days in March:
5 days - Average rainfall days in April:
3 days - Average rainfall days in May:
2 days - Average rainfall days in June:
2 days
- Average rainfall days in July:
10 days - Average rainfall days in August:
11 days - Average rainfall days in September:
5 days - Average rainfall days in October:
3 days - Average rainfall days in November:
3 days - Average rainfall days in December:
5 days
The month with the highest number of rainy days is August (11 days).
The months with the least rainy days are May and June (2 days).
Average snowfall
Mount Lemmon, AZ
The month with the highest snowfall is February (20.4").
The months with the least snowfall are May, June, July, August and September (0").
Average daylight / Average sunshine
Mount Lemmon, AZ
- Average daylight in January:
10h and 2min - Average daylight in February:
11h and 1min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 5min - Average daylight in June:
14h and 1min
- Average daylight in July:
14h and 0min - Average daylight in August:
13h and 2min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 3min - Average daylight in December:
10h and 1min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in January:
7h and 5min - Average sunshine in February:
8h and 4min - Average sunshine in March:
9h and 4min - Average sunshine in April:
10h and 5min - Average sunshine in May:
12h and 1min - Average sunshine in June:
12h and 2min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 2min - Average sunshine in September:
10h and 3min - Average sunshine in October:
9h and 4min - Average sunshine in November:
8h and 4min - Average sunshine in December:
7h and 5min
The month with the most sunshine is June (Average sunshine: 12h and 24min).
The months with the least sunshine are January and December (Average sunshine: 7h and 48min).
Mount Lemmon, Arizona, USA
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