Climate and monthly weather forecastAmmon, ID
Climate and monthly weather forecast
The climate of Ammon
Ammon, Idaho, nestled in the beautiful United States, is characterized by an intriguing climatological profile with a Dfb (Humid Continental, no dry season, warm summer) Köppen climate classification. Unraveling the layers of weather averages reveals an array of behaviors across the various parameters.Throughout the year, there is a clear distinction in temperature patterns, with high temperatures ranging from a low of 28°F (-2.2°C) in January, gradually escalating to a peak of 86.2°F (30.1°C) in July, then falling again towards the year-end. The low temperatures similarly follow a sinusoidal pattern, rising from 14.2°F (-9.9°C) in January to reach 54.3°F (12.4°C) by July and August then falling gently towards year-end.
Rainfall trends exhibit a distribution that peaks bi-modally in May and September with rainfall heights of 0.83" (21mm). The least rainfall occurs in July. Snowfall is primarily confined to the winter months - December to February, with January witnessing the highest snowfall of 3.86" (98mm).
Wind speeds fluctuate minimally throughout the year, ranging a minimum average of 5.8mph (9.3km/h) in January and peaking at 9mph (14.5km/h) in April. The highest gusts of wind occur in April and June, reaching a top speed of 13.5mph (21.7km/h).
The best time to visit Ammon
Visitors to Ammon would find the period from May to September, particularly appealing. With high temperatures reaching between 64.4°F (18°C) to 86.2°F (30.1°C) and low temperatures between 41.2°F (5.1°C) to 54.3°F (12.4°C), it provides an ideal timeframe for outdoor activities. Additionally, the decline in relative humidity, falling from 52% in May to 35% in August, coupled with extended daylight hours, with an average exceeding 14 hours, enhance the overall travel experience.The worst time to visit Ammon
Planning a visit to Ammon between December and February requires a degree of caution. During this period, the weather is frigid with high temperatures dropping as low as 27.9°F (-2.3°C) in January and the minimum temperatures falling to a chilly 15.8°F (-9°C) in December. This period also witnesses substantial snowfall, along with limited sunlight hours which reduce visibility.Spring weather in Ammon
As winter gives way to spring, Ammon experiences a gradual increase in temperatures with the highs ranging from 43°F (6.1°C) in March to 64.4°F (18°C) in May and lows from 27.9°F (-2.3°C) to 41.2°F (5.1°C) in the corresponding months. Rainfall also escalates during spring, and the total daylight hours per month dwell steadily between 12 to 14.7 hours.Summer weather in Ammon
Summer in Ammon heralds warm and balmy weather. High temperatures prevail from 75°F (23.9°C) in June to 84.4°F (29.1°C) in August. Simultaneously, the low temperatures circulate from 47.1°F (8.4°C) to 54.3°F (12.4°C). The skies remain clear during this period, with cloud coverage considerably low, between 11 to 19%.Autumn weather in Ammon
The season shifting from summer to autumn ushers a crisp chill in Ammon along with an abundant rainfall. The drop in temperatures is noticeable, with the highs between 73.6°F (23.1°C) to 55.6°F (13.1°C) from September to November. Additionally, rainfall averages are the highest during this season, and daylight hours begin to decrease.Winter weather in Ammon
Winter in Ammon is characterized by low temperatures and considerable snowfall. December witnesses high temperatures between 41.2°F (5.1°C) and 27.9°F (-2.3°C) and low temperatures between 26.1°F (-3.3°C) and 15.8°F (-9°C). The season is seen off with sizable snowfall, and daylight hours are significantly minimized.Weather in January
January brings the chill of winter to Ammon, Idaho, greeting the year with icy temperatures. The city lies under a blanket of snow, with an average snowfall of 3.86" (98mm) marking the start of the New Year. Days with sunlight are shorter though clear visibility entices winter sports enthusiasts. Weather in January »Weather in February
February in Ammon experiences a slight increase in temperature, yet winter’s grip remains firm. Snow continues to feature prominently although melting snow often yields to a cool and windy climate. The month registers an increase in wind speed, with a maximum average of 7.8mph (12.6km/h). Weather in February »Weather in March
By March, Ammon begins to transition from the harsh winter towards the welcome arrival of spring. Cool temperatures start giving way to warmer days, marking a significant change in the weather. Rainfall is more frequent, signaling nature's reawakening and refreshing the local flora. Weather in March »Weather in April
April portrays a classic spring, characterized by the blooms of flora and an increase in overall temperature. Rain continues its trend from March but with increased frequency, contributing to the bloom of wildflowers. The drop in snowfall to an average of 0.91" (23mm) further reinforces the onset of spring. Weather in April »Weather in May
Ammon in May experiences a definitive spring month, showing an overwhelming transformation from the biting cold of the winter months. Vegetation bursts into full bloom under the increasing sunlight, creating a scenic landscape. The frequency of rain that reaches a height of 0.83" (21mm) on average further enriches the thriving greenery. Weather in May »Weather in June
June ushers in summer, replacing the spring showers with more sunlight and warmer temperatures. The average snowfall touches 0, indicating the complete transition from colder months to the warmth of summer. It's a great time to explore Ammon’s outdoors with the sun shining for an average of 11.7 hours per day. Weather in June »Weather in July
July stands as the hottest month in Ammon. Temperatures surge, illustrating a typical summer with long, warm days. The city basks in the warm sunlight with a UV index reaching a peak at 6. Beautiful summer days are often characterized by blue skies, light breezy afternoons, and glistening sunsets, providing a picturesque backdrop. Weather in July »Weather in August
August holds onto the warmth of July, maintaining a consistent summer weather pattern. Despite the retreat of highest temperatures, the city continues to enjoy sun-soaked afternoons. Rainfall slightly increases to an average of 0.63" (16mm), offering occasional refreshment. Weather in August »Weather in September
September marks the onset of Autumn in Ammon. Summer wanes, yielding to decreasing temperatures, making days and nights cooler while not too cold. A slight increase in average rainfall of 0.83" (21mm) highlights the advent of the fall season. Weather in September »Weather in October
October in Ammon sees unmistakable signs of autumn. With the leaves changing color and cooler air moving in, it signals a transitional phase in the weather. A light snowfall of 0.28" (7mm) on average starts appearing, announcing the city’s gradual shift from the warm to cold months. Weather in October »Weather in November
November ushers in the pre-winter season, with Ammon experiencing a steep drop in temperature. The frequency of snowfall significantly increases, accumulating to an average of 2.44" (62mm), signaling the approach of winter. While the mornings remain frosty, the afternoons possess a slight warmth courtesy of the dwindling sun. Weather in November »Weather in December
December in Ammon witnesses the arrival of full-fledged winter. Snowfall in December reaches an average of 3.46" (88mm), layering the city in a white blanket. The chilly state continues to persist, setting the stage for a typical winter holiday season. Weather in December »Updated: Feb 12, 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
With an average relative humidity of 90%, January is the most humid month.
Throughout the year, in Ammon, there are 84.3 rainfall days, and 6.97" (177mm) of precipitation is accumulated.
January through May, September through December are months with snowfall in Ammon, Idaho.
January is the month with the most snowfall. Snow falls for 12.8 days and accumulates 3.86" (98mm) of snow.
In Ammon, Idaho, during the entire year, snow falls for 54.4 days and aggregates up to 16.89" (429mm) of snow.
January has the least sunshine of the year, with an average of 4.7h of sunshine.
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Ammon, Idaho.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Ammon, 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.
The wettest months in Ammon are May and September, with an average 0.83" (21mm) of rainfall.
June through August are months without snowfall.
With an average of 15h and 24min of daylight, June has the longest days of the year.
Ammon's temperatures tend to reach their peak averages in July, with a high of 86.2°F (30.1°C) and a low of 54.1°F (12.3°C).
The month with the least rainfall in Ammon is July, when the rain falls for 6.6 days and typically collects 0.35" (9mm) of precipitation.
July has the most sunshine of the year, with an average of 11.8h of sunshine.
With an average maximum UV index of 6, July is the month with the highest UV index.
August is the least humid month in Ammon, with an average relative humidity of 35%.
Ammon's coldest month, December, registers temperatures that range from a high of 27.9°F (-2.3°C) to a low of 15.8°F (-9°C).
With an average of 9h and 0min of daylight, December has the shortest days of the year in Ammon.
Average temperature
Ammon, ID
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (27.9°F).
The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).
Average pressure
Ammon, ID
- Average pressure in January:
30.3"Hg - Average pressure in February:
30.16"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.17"Hg - Average pressure in December:
30.26"Hg
The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Ammon, ID
- Average wind speed in January:
5.8mph - Average wind speed in February:
7.1mph - Average wind speed in March:
7.8mph - Average wind speed in April:
9mph - Average wind speed in May:
8.2mph - Average wind speed in June:
8.8mph
- Average wind speed in July:
7.6mph - Average wind speed in August:
7.2mph - Average wind speed in September:
7.6mph - Average wind speed in October:
7.5mph - Average wind speed in November:
7.1mph - Average wind speed in December:
6.1mph
The windiest month (with the highest average wind speed) is April (9mph).
The calmest month (with the lowest average wind speed) is January (5.8mph).
Average humidity
Ammon, ID
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (35%).
Average rainfall
Ammon, ID
- Average rainfall in January:
0.51" - Average rainfall in February:
0.43" - Average rainfall in March:
0.59" - Average rainfall in April:
0.63" - Average rainfall in May:
0.83" - Average rainfall in June:
0.59"
- Average rainfall in July:
0.35" - Average rainfall in August:
0.63" - Average rainfall in September:
0.83" - Average rainfall in October:
0.63" - Average rainfall in November:
0.47" - Average rainfall in December:
0.47"
The wettest months (with the highest rainfall) are May and September (0.83").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days
Ammon, ID
- Average rainfall days in January:
3.7 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
8.3 days - Average rainfall days in April:
9.5 days - Average rainfall days in May:
10.7 days - Average rainfall days in June:
7.3 days
- Average rainfall days in July:
6.6 days - Average rainfall days in August:
8.1 days - Average rainfall days in September:
8.1 days - Average rainfall days in October:
7.2 days - Average rainfall days in November:
4.2 days - Average rainfall days in December:
5.5 days
The month with the highest number of rainy days is May (10.7 days).
The month with the least rainy days is January (3.7 days).
Average snowfall
Ammon, ID
- Average snowfall in January:
3.86" - Average snowfall in February:
2.48" - Average snowfall in March:
2.83" - Average snowfall in April:
0.91" - Average snowfall in May:
0.59" - Average snowfall in June:
0"
The month with the highest snowfall is January (3.86").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Ammon, ID
- Average snowfall days in January:
12.8 days - Average snowfall days in February:
11.3 days - Average snowfall days in March:
6.7 days - Average snowfall days in April:
3.3 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:
0.1 days - Average snowfall days in October:
1.3 days - Average snowfall days in November:
5.7 days - Average snowfall days in December:
12.9 days
The month with the highest number of snowfall days is December (12.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Ammon, ID
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 24min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
4h and 42min - Average sunshine in February:
5h and 30min - Average sunshine in March:
7h and 18min - Average sunshine in April:
9h and 54min - Average sunshine in May:
10h and 48min - Average sunshine in June:
11h and 42min
- Average sunshine in July:
11h and 48min - Average sunshine in August:
11h and 42min - Average sunshine in September:
10h and 0min - Average sunshine in October:
7h and 18min - Average sunshine in November:
6h and 6min - Average sunshine in December:
5h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
Ammon, ID
- Average sunshine days in January:
18.4 days - Average sunshine days in February:
16.2 days - Average sunshine days in March:
18.2 days - Average sunshine days in April:
16.6 days - Average sunshine days in May:
18.3 days - Average sunshine days in June:
19.3 days
- Average sunshine days in July:
20.4 days - Average sunshine days in August:
18.2 days - Average sunshine days in September:
19.4 days - Average sunshine days in October:
22.1 days - Average sunshine days in November:
21.5 days - Average sunshine days in December:
17.5 days
The month with the most sunshine days is October (22.1 days).
The month with the least sunshine days is February (16.2 days).
Average UV index
Ammon, ID
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover
Ammon, ID
The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility
Ammon, ID
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
