Yearly & Monthly weather - American Fork, UT

The climate of American Fork

Predominantly categorized under the Humid continental (Dfa type) by Köppen climate classification, the municipality of American Fork, Utah experiences distinct variations in seasonal temperatures and substantial rainfall throughout the year. This climate type signifies no dry season with hot summers being prevalent.

Temperatures fluctuate significantly over the year in American Fork. High temperatures average from 32.4°F (0.2°C) in the colder months of January and December, and rise to the warmest month being July, with an average high of 85.3°F (29.6°C). Meanwhile, the low-temperature averages range from 15.8°F (-9°C) in January, the coldest month, to a considerably warmer 58.1°F (14.5°C) in July. The relative humidity follows the opposite pattern, starting at 86% in January, then gradually lessens to a dry 38% in July and August.

In terms of precipitation, both rainfall and snowfall contribute the annual averages. Rainfall ranges from the lowest in June, receiving just 0.75" (19mm), to the highest in April and December, with average monthly precipitation of 1.93" (49mm). As for the snowy conditions, the heavy snowfall is typically from 11.06" (281mm) in January to nothing between June and October, picking back up in November with 4.69" (119mm), and reaching its peak again in December at 10.16" (258mm).

The wide spectrum of climatological parameters extends to aspects of sunlight and wind as well. Daylight hours peak at 15 hours in June and diminish to 9.3 hours by December. Simultaneously, average UV index follows the same pattern, soaring from 1 in January to 6 in July. Albeit, the wind speeds do not see such extremes, hovering around 4.6mph (7.4km/h) in January to 6.2mph (10km/h) in April, and dipping back to 5.2mph (8.4km/h) at the year's end.

The best time to visit American Fork

The most pleasant stretch of the year for a visit to American Fork would be from May to September, when the climate conditions are most enjoyable. During these months, temperatures range from 63°F (17.2°C) to 82.9°F (28.3°C) (high) and 39.7°F (4.3°C) to 57°F (13.9°C) (low), conducive for outdoor exploration. The humidity percentages significantly decrease too, dropping to around 40% in June from the higher 80-90s in 'colder' months.

This period also enjoys the most daily sunshine hours with averages of 11.1 hours in May to 11.9 hours in August. Subsequently, the UV index is at its highest and ideal for those eager to catch some rays. However, the relatively lower rainfall during this period, especially 0.75" (19mm) in June, ensures that outdoor plans are rarely disrupted.

The worst time to visit American Fork

Plan a trip to American Fork in the colder months of the year might be less enjoyable for travelers seeking mild weather and outdoor activities. The period from December to February sees temperatures drop drastically with high temperatures averaging between 32.4°F (0.2°C) to 35.6°F (2°C) and lows reaching a freezing 15.8°F (-9°C) to 20.3°F (-6.5°C).

Additionally, these months bring an increase in precipitation, both in terms of rainfall and snowfall. Expect an approximate of 1.93" (49mm) of rainfall in December and January each, along with substantial snowfall, around 11.06" (281mm) in January. Furthermore, shorter daylight hours during these months result in less sunshine and outdoor time for visitors.

Spring weather in American Fork

From March to May, American Fork experiences an upsurge in temperature, giving rise to the refreshing spring season. Temperatures increase progressively, from highs of 44.6°F (7°C) in March to 63°F (17.2°C) in May and lows from 27.5°F (-2.5°C) to 39.7°F (4.3°C). The season also sees a decrease in relative humidity, making the climate more enjoyable.

Rainfall too sees an uptick, with each month receiving approximately 1.85" (47mm) in March and 1.93" (49mm) in April, dropping slightly to 1.42" (36mm) in May. Snowfall yet begins to decrease noticeably from 5.39" (137mm) in March to a mere 0.12" (3mm) in May.

Summer weather in American Fork

Experiencing the characteristic hot summers of the Dfa climate, American Fork experiences temperatures that average from 63°F (17.2°C) to 85.3°F (29.6°C) (high) and 39.7°F (4.3°C) to 58.1°F (14.5°C) (low) between June to August, making it the warmest season. A combination of declining humidity, increasing daylight hours (peaking at 15 hours in June), and a surge in sunshine hours contribute to the formation of long, hot summers.

The defining feature of this season, though, is the low rainfall, with 0.75" (19mm) being the lowest in June, and no snowfall across the season, making it ideal for outdoor activities and water sports.

Autumn weather in American Fork

Fall in American Fork from September to November brings a gradual decrease in temperature, with high temperatures declining from 74.1°F (23.4°C) to 44.6°F (7°C) and low temperatures from 48.9°F (9.4°C) to 27.5°F (-2.5°C). The humidity begins to rise again, starting at 43% in September and reaching 65% in November.

As compared to summer, both rainfall and snowfall see a slight increase during this season. Rainfall ranges from 0.98" (25mm) in September to 1.22" (31mm) in November, and snowfall begins to make an appearance in November with an average of 4.69" (119mm).

Winter weather in American Fork

Winter takes a firm hold from December to February, marked by snowfall and temperatures dropping below freezing. Average high temperatures vary from 32.4°F (0.2°C) to 35.6°F (2°C), while the lows can drop to between 15.8°F (-9°C) and 20.3°F (-6.5°C).

Understandably, this season is the coldest and is characterized by high precipitation, with rainfall ranging from 1.22" (31mm) in November to 1.93" (49mm) in December and January. Snowfall is significant, peaking at 11.06" (281mm) in January. However, it is this winter wonderland image that attracts individuals interested in winter sports like skiing and snowboarding.

Weather in January

January in American Fork, Utah, ushers in the New Year with a chill, typically exhibiting the coldest temperatures of the season. A thick blanket of snow usually continues to wrap the city, with a snowfall accumulation of 11.06" (281mm). Weather in January »

Weather in February

February displays a slight increase in temperature compared to January, but the weather in American Fork continues to be dominated by winter's chill. Snowfall is slightly less intense than in January, marking a gradual transition towards spring. Weather in February »

Weather in March

The weather in March provides a noticeable shift as winter starts to recede, giving way to the early signs of spring. Snowfall reduces significantly to 5.39" (137mm), as the city starts to thaw out from winter's freeze. A slow yet steady rise in temperature brings new life to the scenic landscapes of American Fork. Weather in March »

Weather in April

April sees American Fork further embracing the charms of spring weather, with temperatures continuing their upward climb from March. Rainfall replaces snow, with 1.93" (49mm) of precipitation typically recorded during the month. The changes brought by the season become more apparent as the city starts to get greener. Weather in April »

Weather in May

In May, American Fork basks in arguably the most pleasant weather conditions of the year. However, it is worth noting that 1.42" (36mm) of rainfall is typically recorded during this month. People can comfortably indulge in outdoor pursuits as the spring weather creates an idyllic ambience with perfect temperatures and ample sunshine. Weather in May »

Weather in June

June ushers in the summer season in American Fork, bringing the highest daylight hours of the year. The temperatures are comfortably warm, and the weather stays relatively dry with a stark reduction in rainfall from May to June. The city is vibrant under clear, mainly cloudless skies, and sunny days are the norm. Weather in June »

Weather in July

July marks the peak of summer in American Fork. It is the hottest month with temperatures soaring to 85.3°F (29.6°C). Despite the high heat, humidity remains low, preventing the weather from becoming muggy and uncomfortable. The city comes alive with summer festivities amidst the typically clear skies and abundant sunshine. Weather in July »

Weather in August

The weather in August in American Fork shows a gradual cooling trend from July's peak summer conditions. The temperature witnesses a slight dip but the month continues to retain the summer character. The city basks in plentiful sunshine under mostly clear skies, encouraging outdoor activities. Weather in August »

Weather in September

Weather in September in American Fork introduces the first hints of the impending fall season. There is a significant drop in temperature from August's high, and autumnal color starts to paint the city’s landscape. September's weather is known to be changeable, offering both the last warm summer days and the initial fresh autumn chills. Weather in September »

Weather in October

October embraces autumn in full as temperatures continue their downward trend from September in American Fork. The city is awash with the hues of fall, under mostly clear skies. The weather is much cooler than in the previous month, yet it remains comfortable for most outdoor activities. Weather in October »

Weather in November

November marks the transition from autumn to winter in American Fork. The weather becomes noticeably colder, with temperatures resembling those of early winter. However, the snowfall is relatively light at 4.69" (119mm). The seasonal change brings shorter daylight hours, adding a distinct chill to the air. Weather in November »

Weather in December

December in American Fork signals the beginning of winter, with a significant drop in temperature from November, visible by the average low dipping to 17.2°F (-8.2°C). Snowfall intensifies, recording 10.16" (258mm), closely matching the amount seen at the beginning of the year. Weather in December »

Updated: Jul 3, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest?

Temperatures reach their minimum during January and December, recording an average high-temperature of 32.4°F (0.2°C).

What is the most humid month in American Fork?

With an average relative humidity of 86%, January is the most humid month.

How much does it rain?

Throughout the year, in American Fork, there are 123.2 rainfall days, and 16.73" (425mm) of precipitation is accumulated.

When does it snow?

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

What is the snowiest month?

January is the month with the most snowfall. Snow falls for 12.7 days and accumulates 11.06" (281mm) of snow.

How much does it snow?

Throughout the year, in American Fork, there are 58.5 snowfall days, and 44.49" (1130mm) of snow is accumulated.

What is the month with the least sunshine?

With an average of 5.4h of sunshine, January has the least sunshine of the year.

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 MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.

What is the wettest month?

The wettest months in American Fork are April and December, with an average 1.93" (49mm) of rainfall.

What is the driest month?

June is the month with the least rainfall. Rain falls for 7.3 days and accumulates 0.75" (19mm) of precipitation.

When it does not snow?

In American Fork, snow does not fall in June through September.

When are the longest days?

The month with the longest days is June, with an average of 15h and 0min of daylight.

What month is the hottest?

American Fork's temperature records reveal July as the warmest month, marked by average highs of 85.3°F (29.6°C) and lows of 58.1°F (14.5°C).

What is the least humid month in American Fork?

With an average relative humidity of 38%, July is the least humid month.

What is the month with the highest UV index?

With an average maximum UV index of 6, July is the month with the highest UV index.

What month has the most sunshine?

The month with the most sunshine is August, with an average of 11.9h of sunshine.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

When is the lowest UV index?

The month with the lowest UV index is December, with an average maximum UV index of 1.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N D

Average temperature
American Fork, UT

Average high temperature in January:
32.4°F
Average high temperature in February:
35.6°F
Average high temperature in March:
44.6°F
Average high temperature in April:
51.8°F
Average high temperature in May:
63°F
Average high temperature in June:
76.6°F

Average high temperature in July:
85.3°F
Average high temperature in August:
82.9°F
Average high temperature in September:
74.1°F
Average high temperature in October:
57.6°F
Average high temperature in November:
44.6°F
Average high temperature in December:
32.4°F

The warmest month (with the highest average high temperature) is July (85.3°F).
The months with the lowest average high temperature are January and December (32.4°F).

Average low temperature in January:
15.8°F
Average low temperature in February:
20.3°F
Average low temperature in March:
27.5°F
Average low temperature in April:
32.5°F
Average low temperature in May:
39.7°F
Average low temperature in June:
48.7°F

Average low temperature in July:
58.1°F
Average low temperature in August:
57°F
Average low temperature in September:
48.9°F
Average low temperature in October:
38.1°F
Average low temperature in November:
27.5°F
Average low temperature in December:
17.2°F

The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).

Average pressure
American Fork, UT

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

Average wind speed
American Fork, UT

The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is January (4.6mph).

Average humidity
American Fork, UT

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is July (38%).

Average rainfall
American Fork, UT

The wettest months (with the highest rainfall) are April and December (1.93").
The driest month (with the least rainfall) is June (0.75").

Average rainfall days
American Fork, UT

Average rainfall days in January:
7.8 days
Average rainfall days in February:
10.3 days
Average rainfall days in March:
13.7 days
Average rainfall days in April:
14.2 days
Average rainfall days in May:
14.3 days
Average rainfall days in June:
7.3 days

Average rainfall days in July:
9.3 days
Average rainfall days in August:
9.7 days
Average rainfall days in September:
9.7 days
Average rainfall days in October:
9.4 days
Average rainfall days in November:
7.3 days
Average rainfall days in December:
10.2 days

The month with the highest number of rainy days is May (14.3 days).
The months with the least rainy days are June and November (7.3 days).

Average snowfall
American Fork, UT

The month with the highest snowfall is January (11.06").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
American Fork, UT

Average snowfall days in January:
12.7 days
Average snowfall days in February:
11.9 days
Average snowfall days in March:
8.6 days
Average snowfall days in April:
4.6 days
Average snowfall days in May:
0.3 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:
1.2 days
Average snowfall days in November:
6.2 days
Average snowfall days in December:
13 days

The month with the highest number of snowfall days is December (13 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
American Fork, UT

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 2min
Average daylight in June:
15h and 0min

Average daylight in July:
14h and 4min
Average daylight in August:
13h and 4min
Average daylight in September:
12h and 2min
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 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

Average sunshine in January:
5h and 2min
Average sunshine in February:
6h and 4min
Average sunshine in March:
8h and 1min
Average sunshine in April:
9h and 5min
Average sunshine in May:
11h and 1min
Average sunshine in June:
11h and 5min

Average sunshine in July:
11h and 5min
Average sunshine in August:
11h and 5min
Average sunshine in September:
10h and 0min
Average sunshine in October:
7h and 3min
Average sunshine in November:
6h and 4min
Average sunshine in December:
5h and 4min

The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).

Average sunshine days
American Fork, UT

Average sunshine days in January:
15.7 days
Average sunshine days in February:
11.4 days
Average sunshine days in March:
13.2 days
Average sunshine days in April:
11.8 days
Average sunshine days in May:
13.9 days
Average sunshine days in June:
19.3 days

Average sunshine days in July:
15.9 days
Average sunshine days in August:
15.3 days
Average sunshine days in September:
16.5 days
Average sunshine days in October:
19.5 days
Average sunshine days in November:
18.5 days
Average sunshine days in December:
13.9 days

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is February (11.4 days).

Average UV index
American Fork, UT

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover
American Fork, UT

The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 10).

Average visibility
American Fork, UT

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

Climate and monthly weather forecastAmerican Fork, UT

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