Climate and monthly weather forecastLewiston, UT
Climate and monthly weather forecast
Weather in January
January, the same as December, in Lewiston, Utah, is a freezing cold winter month, with an average temperature varying between 13.6°F (-10.2°C) and 28.8°F (-1.8°C). January's onset brings an average high-temperature of a still subzero cold 28.8°F (-1.8°C), showing a minute difference from December's 28.6°F (-1.9°C). Weather in January »Weather in February
February, the last month of the winter in Lewiston, is another freezing cold month, with an average temperature ranging between min 17.1°F (-8.3°C) and max 31.1°F (-0.5°C). Lewiston ushers in February with an average high-temperature of a still freezing cold 31.1°F (-0.5°C), showing a close resemblance to the previous month. Weather in February »Weather in March
The first month of the spring, March, is a wintry month in Lewiston, Utah, with temperature in the range of an average low of 25.5°F (-3.6°C) and an average high of 40.3°F (4.6°C). Lewiston in March sees a temperature change, with average high-temperatures moving from a freezing cold 31.1°F (-0.5°C) in February to a cold 40.3°F (4.6°C). Weather in March »Weather in April
April is a frosty spring month in Lewiston, Utah, with an average temperature varying between 49.1°F (9.5°C) and 30.6°F (-0.8°C). As March transitions into April, a subtle temperature shift is observed, with average highs adjusting from an icy 40.3°F (4.6°C) to a frosty 49.1°F (9.5°C). Weather in April »Weather in May
The last month of the spring, May, is a moderate month in Lewiston, Utah, with temperature in the range of an average low of 37.8°F (3.2°C) and an average high of 59.7°F (15.4°C). In Lewiston, stepping into May brings a temperature increase, moving up from April's chilly 49.1°F (9.5°C) to a moderate 59.7°F (15.4°C). Weather in May »Weather in June
June, the first month of the summer in Lewiston, is a pleasant month, with an average temperature varying between 46°F (7.8°C) and 72.7°F (22.6°C). Lewiston's transition into June brings a rise in the average high-temperature, moving from a refreshing 59.7°F (15.4°C) in May to an agreeable 72.7°F (22.6°C). Weather in June »Weather in July
July is a warm summer month in Lewiston, Utah, with an average temperature ranging between min 55.4°F (13°C) and max 82.8°F (28.2°C). Temperature readings reach their annual highs in July, averaging 82.8°F (28.2°C) and a minimum average of 55.4°F (13°C). The heat index for July is computed to be 82.4°F (28°C). Weather in July »Weather in August
August, the last month of the summer in Lewiston, is another warm month, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 54.5°F (12.5°C). The advent of August observes an average high-temperature of a still warm 81.1°F (27.3°C), nearly identical to July's 82.8°F (28.2°C). Weather in August »Weather in September
The first month of the autumn, September, is still a pleasant month in Lewiston, Utah, with an average temperature ranging between max 71.2°F (21.8°C) and min 46.8°F (8.2°C). Lewiston's transition into September involves a shift in temperature, receding from a warm 81.1°F (27.3°C) in August to an agreeable 71.2°F (21.8°C). Weather in September »Weather in October
October, the same as September, is another fresh autumn month in Lewiston, Utah, with an average temperature fluctuating between 34.9°F (1.6°C) and 54.3°F (12.4°C). October's onset brings a noticeable temperature drop, falling from a pleasant 71.2°F (21.8°C) in September to a cool 54.3°F (12.4°C). Weather in October »Weather in November
November, the last month of the autumn in Lewiston, is also an icy month, with an average temperature varying between 25.3°F (-3.7°C) and 40.8°F (4.9°C). Onset of November witnesses a reduction in the average high-temperature, falling from a fresh 54.3°F (12.4°C) in October to a wintry 40.8°F (4.9°C). Weather in November »Weather in December
December, the first month of the winter in Lewiston, is still a freezing cold month, with an average temperature fluctuating between 15.1°F (-9.4°C) and 28.6°F (-1.9°C). Lewiston's December weather, marked by an average high temperature of 28.6°F (-1.9°C) and an average low temperature of 15.1°F (-9.4°C), is the coldest in the year. Weather in December »Updated: Feb 14, 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.
January is the month with the most rainfall. Rain falls for 8.2 days and accumulates 2.24" (57mm) of precipitation.
In Lewiston, during the entire year, the rain falls for 117.9 days and collects up to 17.68" (449mm) of precipitation.
Months with snowfall in Lewiston are January through May, September through December.
The month with the most snowfall in Lewiston, Utah, is January, when snow falls for 15.9 days and typically aggregates up to 16.73" (425mm) of snow.
Throughout the year, in Lewiston, there are 71.1 snowfall days, and 56.1" (1425mm) of snow is accumulated.
With an average of 4.8h of sunshine, January has the least sunshine of the year in Lewiston, Utah.
The months with the lowest UV index in Lewiston are January and December, with an average maximum UV index of 1.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Lewiston, Utah, 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.
June through August are months without snowfall.
With an average of 15h and 12min of daylight, June has the longest days of the year in Lewiston, Utah.
July, recording an average high temperature of 82.8°F (28.2°C) and a low temperature of 55.4°F (13°C), is Lewiston's warmest month.
July is the month with the least rainfall in Lewiston, Utah. Rain falls for 7.3 days and accumulates 0.63" (16mm) of precipitation.
The months with the most sunshine in Lewiston are July and August, with an average of 11.9h of sunshine.
July is the month with the highest UV index in Lewiston, with an average maximum UV index of 6.
August is the least humid month, with an average relative humidity of 38%.
December tends to be the coldest month in Lewiston, with temperatures averaging a daily high of 28.6°F (-1.9°C) and a low of 15.1°F (-9.4°C).
December has the shortest days of the year in Lewiston, Utah, with an average of 9h and 12min of daylight.
Average temperature
Lewiston, UT
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is December (28.6°F).
The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure
Lewiston, UT
- Average pressure in January:
30.29"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.89"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.15"Hg - Average pressure in December:
30.25"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Lewiston, UT
- Average wind speed in January:
4.2mph - Average wind speed in February:
4.8mph - Average wind speed in March:
5.3mph - Average wind speed in April:
5.7mph - Average wind speed in May:
5.4mph - Average wind speed in June:
5.7mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.7mph - Average wind speed in September:
5.3mph - Average wind speed in October:
4.7mph - Average wind speed in November:
4.8mph - Average wind speed in December:
4.3mph
The windiest months (with the highest average wind speed) are April, June and August (5.7mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity
Lewiston, UT
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (38%).
Average rainfall
Lewiston, UT
- Average rainfall in January:
2.24" - Average rainfall in February:
2.2" - Average rainfall in March:
1.93" - Average rainfall in April:
1.77" - Average rainfall in May:
1.93" - Average rainfall in June:
1.14"
- Average rainfall in July:
0.63" - Average rainfall in August:
0.71" - Average rainfall in September:
1.06" - Average rainfall in October:
1.1" - Average rainfall in November:
1.18" - Average rainfall in December:
1.77"
The wettest month (with the highest rainfall) is January (2.24").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days
Lewiston, UT
- Average rainfall days in January:
8.2 days - Average rainfall days in February:
9.1 days - Average rainfall days in March:
13.6 days - Average rainfall days in April:
14.4 days - Average rainfall days in May:
14.9 days - Average rainfall days in June:
9.6 days
- Average rainfall days in July:
7.3 days - Average rainfall days in August:
7.6 days - Average rainfall days in September:
8.7 days - Average rainfall days in October:
9.6 days - Average rainfall days in November:
6.7 days - Average rainfall days in December:
8.2 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is November (6.7 days).
Average snowfall
Lewiston, UT
- Average snowfall in January:
16.73" - Average snowfall in February:
11.69" - Average snowfall in March:
6.46" - Average snowfall in April:
2.64" - Average snowfall in May:
0.2" - Average snowfall in June:
0"
The month with the highest snowfall is January (16.73").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Lewiston, UT
- Average snowfall days in January:
15.9 days - Average snowfall days in February:
15.3 days - Average snowfall days in March:
9.8 days - Average snowfall days in April:
5 days - Average snowfall days in May:
0.5 days - Average snowfall days in June:
0.1 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:
1.9 days - Average snowfall days in November:
7.4 days - Average snowfall days in December:
15.1 days
The month with the highest number of snowfall days is January (15.9 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Lewiston, UT
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
4h and 48min - Average sunshine in February:
5h and 24min - Average sunshine in March:
7h and 30min - Average sunshine in April:
9h and 36min - Average sunshine in May:
10h and 42min - Average sunshine in June:
11h and 42min
- Average sunshine in July:
11h and 54min - Average sunshine in August:
11h and 54min - Average sunshine in September:
10h and 0min - Average sunshine in October:
7h and 18min - Average sunshine in November:
6h and 30min - Average sunshine in December:
5h and 12min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days
Lewiston, UT
- Average sunshine days in January:
14.1 days - Average sunshine days in February:
9.1 days - Average sunshine days in March:
11.4 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
12.8 days - Average sunshine days in June:
17.6 days
- Average sunshine days in July:
18.2 days - Average sunshine days in August:
18.2 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
18.7 days - Average sunshine days in December:
13.5 days
The month with the most sunshine days is October (19.4 days).
The month with the least sunshine days is February (9.1 days).
Average UV index
Lewiston, UT
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Lewiston, UT
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility
Lewiston, UT
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
