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Contents
- The climate of Caldwell
- The best time to visit Caldwell
- The worst time to visit Caldwell
- Spring weather in Caldwell
- Summer weather in Caldwell
- Autumn weather in Caldwell
- Winter weather in Caldwell
- 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 pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
A small, calm river flows via a scenic nature park full of trees in the city of Caldwell, Idaho
The climate of Caldwell
Caldwell, Idaho, adheres to the Köppen climate classification BSk, which manifests as a mid-latitude steppe. This zone, situated amidst a considerable geographical position, carries a semi-arid yet temperate climate. Throughout the year, the region witnesses consistent shifts in temperatures, ranging from a low of 24.8°F (-4°C) in the coldest months to reaching a peak at 90.9°F (32.7°C) in the warmer periods.
Interpreting the weather data across the year, it becomes evident that Caldwell experiences notable levels of humidity. The lowest median relative humidity of 29% is found during August, while the highest, at 79%, presents in January. Rainfall, on the other hand, presents an irregular pattern. The months with maximum precipitation include January and March, recording 1.3" (33mm) and 1.38" (35mm) of rainfall, respectively. Alternatively, July and August experience the least rainfall, accounting for 0.16" (4mm) and 0.2" (5mm) consecutively.
One distinctive characteristic of Caldwell's weather is the presence of snowy conditions in the cooler months. Maximum snowfall of about 3.35" (85mm) can be observed in December, with the number of snow days climbing to 7.2. In contrast, from May to September, this city in Idaho does not experience any snowfall.
Interpreting the weather data across the year, it becomes evident that Caldwell experiences notable levels of humidity. The lowest median relative humidity of 29% is found during August, while the highest, at 79%, presents in January. Rainfall, on the other hand, presents an irregular pattern. The months with maximum precipitation include January and March, recording 1.3" (33mm) and 1.38" (35mm) of rainfall, respectively. Alternatively, July and August experience the least rainfall, accounting for 0.16" (4mm) and 0.2" (5mm) consecutively.
One distinctive characteristic of Caldwell's weather is the presence of snowy conditions in the cooler months. Maximum snowfall of about 3.35" (85mm) can be observed in December, with the number of snow days climbing to 7.2. In contrast, from May to September, this city in Idaho does not experience any snowfall.
The best time to visit Caldwell
Given the climate data, the ideal time to visit depends predominantly on the preferred activities of the traveler. As June through August chronicle the most sunshine hours, pushing 11.5 to 15.4 hours daily, these months stand as an appropriate choice for outdoor exploration. The average temperatures scale between a high of 78.6°F (25.9°C) and a max of 90.9°F (32.7°C), making summer a favorable season for many visitors. Moreover, this period sees less rain, with precipitation levels plunging to 0.83" (21mm) in June and as low as 0.16" (4mm) in July.
The worst time to visit Caldwell
In contrast, winter might prove challenging to visitors. Particularly from December to February, temperatures plummet from 36.3°F (2.4°C) to 25.3°F (-3.7°C), coupled with frequent snowfall. The month of December experiences the highest snowfall, measuring around 3.35" (85mm). Additionally, these months record minimum sunlight with an average duration ranging from 5.7 hours to 5.9 hours daily, making outdoor activities less appealing. Thus, those ill-equipped to handle the colder conditions might face difficulties during this period.
Spring weather in Caldwell
Spring in Caldwell signals moderate temperatures, with averages slowly escalating from 52.3°F (11.3°C) in March to 69.6°F (20.9°C) by May. Concurrently, relative humidity also decreases from 62% in March to 47% in May. Rainfall during this period varies irregularly, with March seeing the highest at 1.38" (35mm) before tapering off to 0.98" (25mm) in May. Daily sunshine hours also increase progressively, advancing from 8.1 hours in March to 11.2 hours by the end of spring.
Summer weather in Caldwell
Caldwell's summer months offer favorable conditions for outdoor activities. Temperatures escalate from June to July, ranging from 78.6°F (25.9°C) to 90.9°F (32.7°C). Nevertheless, August sees a slight dip to 89.8°F (32.1°C). The overall humidity during this period hovers between 43% and 30%. This season also witnesses a drop in rainfall, with the lowest level of 0.16" (4mm) in July. Ample sunshine hours also contribute to the allure of summer.
Autumn weather in Caldwell
Autumn in Caldwell introduces mild weather, with recorded temperatures descending from 78.3°F (25.7°C) in September to 36.3°F (2.4°C) by November. With the ushering of fall, a gradual increase in humidity is conspicuous, elevating from 35% in September to 63% in November. Furthermore, rainfall increases slightly to 0.75" (19mm) in November, while sunshine hours reduce from 9.5 hours in September to 6.6 hours by November.
Winter weather in Caldwell
Caldwell's winter season is prominent for its cold temperatures and snowfall. From December to February, temperatures shift from a high of 36.3°F (2.4°C) to a low of 24.8°F (-4°C). Snowfall is significant, with the highest level of 3.35" (85mm) observed in December. In these months, daylight hours are fewer, averaging between 9 hours and 9.4 hours per day, while the average hours of sunshine fall between 5.7 hours and 5.9 hours per day. Hence, winter in Caldwell usually brings with it a chilly and less sunny weather.
Weather in January
January climate in Caldwell, Idaho commences with a typical winter pattern. The city experiences a surge in humidity levels, making it the highest for the year. Snowfall of 2.8" (71mm) can be witnessed mostly, rapidly converting the city into a winter wonderland. Weather in January »
Weather in February
Caldwell bears a similar meteorological pattern in February as its predecessor. Despite witnessing a slight elevation in temperature, winter continues to prevail, making outdoor activities limited to winter sports. Snowfall from 2.8" (71mm) declines to 1.97" (50mm), suggesting a gradual transition to spring. Weather in February »
Weather in March
The weather in March witnesses a significant evolution. Temperatures climb to moderate levels initiating the onset of spring. The city receives the highest rainfall of the year measured at 1.38" (35mm), as the warmer temperature starts to melt the last of winter’s remnants. Weather in March »
Weather in April
April in Caldwell features punishing weather variability. With temperatures swinging from 40.6°F (4.8°C) to 59.9°F (15.5°C), it introduces warmer days while battling the dying bearers of the winter chill. The cloud coverage decreases to 29%, giving way to clear skies and ample sunshine. Weather in April »
Weather in May
May signifies a leap toward pleasant weather, a welcome change after the winter months. The residents are greeted by blooming flora, with the mercury soaring to 69.6°F (20.9°C). The city basks in a generous 11.2 hours of sunshine daily, becoming a haven for outdoor enthusiasts. Weather in May »
Weather in June
June in Caldwell witnesses a stronghold of the summer season. The number of days receiving sunshine increases to 18.8, making it one of the sunniest months of the year. Temperature highs reach 78.6°F (25.9°C), marking the dawn of longer, warmer days. Weather in June »
Weather in July
July, being the heart of summer, brings scorching temperatures hitting a high of 90.9°F (32.7°C). The rainfall hits a yearly low, dropping to 0.16" (4mm), and nature falls largely silent under the searing sun. Outdoor activities are best planned for the cooler mornings or evenings. Weather in July »
Weather in August
August witnesses a slight dip in temperature but remains high, maintaining the summer's essence. Rainfall sees a minuscule increase, rising to 0.2" (5mm), but the summer heat dominates most days, challenging the relief brought by the occasional drizzle. Weather in August »
Weather in September
An air of change rustles through Caldwell as September steps in, with autumn beginning its reign subtly. The peak summer heat starts to decline, bringing much-needed relief. While the temperatures continue to remain on the higher side, touching 78.3°F (25.7°C), the nights turn pleasantly cool. Weather in September »
Weather in October
October biblically represents the harvest season, and Caldwell is no exception to this rule. The weather subtly transforms daily, shedding its summer warmth and embracing the coolness of autumn fully. Temperatures take a significant downturn, making days cooler. Weather in October »
Weather in November
As November rolls in, Caldwell starts gearing up for the approaching winter. The scenery evolves with falling leaves, painting the city in varying hues of yellow and orange. A noticeable decrease in temperature is observed, introducing a chill in the air. Weather in November »
Weather in December
December brings along the holiday spirit and a noticeable change in the atmosphere. Caldwell steps into December with a significant lowering of temperatures, making it the coldest month at 36.3°F (2.4°C) and marking the onset of winter. Weather in December »
Updated: Jul 31, 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
What is the most humid month?
The most humid month is January, with an average relative humidity of 79%.
How much does it rain in Caldwell?
Throughout the year, there are 103.7 rainfall days, and 9.84" (250mm) of precipitation is accumulated.
When does it snow?
January through April, November and December are months with snowfall.
How much does it snow?
In Caldwell, during the entire year, snow falls for 22.2 days and aggregates up to 9.76" (248mm) of snow.
When is the lowest UV index in Caldwell?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What is the rainiest month?
The month with the most rainfall is March, when the rain falls for 15.1 days and typically aggregates up to 1.38" (35mm) of precipitation.
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.
When it does not snow?
May through October are months without snowfall.
When are the longest days?
The month with the longest days is June, with an average of 15h and 24min of daylight.
What is the hottest time of year?
The warmest time of the year is July, with temperatures averaging a high of 90.9°F (32.7°C) and a low of 62.2°F (16.8°C).
What is the driest month?
July is the month with the least rainfall in Caldwell. Rain falls for 3.9 days and accumulates 0.16" (4mm) of precipitation.
What month has the most sunshine?
With an average of 12.1h of sunshine, July has the most sunshine of the year.
What is the month with the highest UV index?
With an average maximum UV index of 7, July is the month with the highest UV index.
What is the least humid month?
August is the least humid month, with an average relative humidity of 29%.
What time of the year is the coldest?
Caldwell's coldest month, December, generally records average temperatures ranging from a high of 36.3°F (2.4°C) to a low of 24.8°F (-4°C).
When does it snow the most?
December is the month with the most snowfall. Snow falls for 7.2 days and accumulates 3.35" (85mm) of snow.
What is the month with the shortest days in Caldwell?
With an average of 9h and 0min of daylight, December has the shortest days of the year.
What is the month with the least sunshine?
The month with the least sunshine is December, with an average of 5.7h of sunshine.
Average temperature
Caldwell, ID
The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is December (36.3°F).
The month with the highest average low temperature is August (62.8°F).
The coldest month (with the lowest average low temperature) is December (24.8°F).
Average pressure
Caldwell, ID
- Average pressure in January:
30.25"Hg - Average pressure in February:
30.13"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.95"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.21"Hg
The month with the highest atmospheric pressure is January (30.25"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed
Caldwell, ID
- Average wind speed in January:
5.2mph - Average wind speed in February:
6.4mph - Average wind speed in March:
7.2mph - Average wind speed in April:
7.3mph - Average wind speed in May:
6.5mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.4mph - Average wind speed in October:
5.5mph - Average wind speed in November:
6mph - Average wind speed in December:
5.9mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is January (5.2mph).
Average humidity
Caldwell, ID
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (29%).
Average rainfall
Caldwell, ID
- Average rainfall in January:
1.3" - Average rainfall in February:
1.06" - Average rainfall in March:
1.38" - Average rainfall in April:
0.83" - Average rainfall in May:
0.98" - Average rainfall in June:
0.83"
- Average rainfall in July:
0.16" - Average rainfall in August:
0.2" - Average rainfall in September:
0.31" - Average rainfall in October:
0.71" - Average rainfall in November:
0.75" - Average rainfall in December:
1.34"
The wettest month (with the highest rainfall) is March (1.38").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days
Caldwell, ID
- Average rainfall days in January:
9.8 days - Average rainfall days in February:
9.6 days - Average rainfall days in March:
15.1 days - Average rainfall days in April:
11.7 days - Average rainfall days in May:
9.9 days - Average rainfall days in June:
7.8 days
- Average rainfall days in July:
3.9 days - Average rainfall days in August:
3.5 days - Average rainfall days in September:
5.9 days - Average rainfall days in October:
8 days - Average rainfall days in November:
8.6 days - Average rainfall days in December:
9.9 days
The month with the highest number of rainy days is March (15.1 days).
The month with the least rainy days is August (3.5 days).
Average snowfall
Caldwell, ID
The month with the highest snowfall is December (3.35").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Caldwell, ID
- Average snowfall days in January:
5.6 days - Average snowfall days in February:
5.2 days - Average snowfall days in March:
1.8 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0 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:
0.1 days - Average snowfall days in November:
2 days - Average snowfall days in December:
7.2 days
The month with the highest number of snowfall days is December (7.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Caldwell, ID
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 1min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - 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:
5h and 5min - Average sunshine in February:
7h and 5min - Average sunshine in March:
8h and 1min - Average sunshine in April:
9h and 4min - Average sunshine in May:
11h and 1min - Average sunshine in June:
11h and 3min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
11h and 2min - Average sunshine in September:
9h and 3min - Average sunshine in October:
8h and 1min - Average sunshine in November:
6h and 4min - Average sunshine in December:
5h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days
Caldwell, ID
- Average sunshine days in January:
17.6 days - Average sunshine days in February:
15.7 days - Average sunshine days in March:
14.6 days - Average sunshine days in April:
16.3 days - Average sunshine days in May:
18.6 days - Average sunshine days in June:
18.8 days
- Average sunshine days in July:
23.3 days - Average sunshine days in August:
22.9 days - Average sunshine days in September:
21.8 days - Average sunshine days in October:
21.7 days - Average sunshine days in November:
18.6 days - Average sunshine days in December:
17 days
The month with the most sunshine days is July (23.3 days).
The month with the least sunshine days is March (14.6 days).
Average UV index
Caldwell, ID
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Caldwell, ID
The month with the most cloud cover is December (Cloud cover 39).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility
Caldwell, ID
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).
Caldwell, Idaho, USA
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