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Contents
- 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
Weather in January
January, the same as December, in Lewiston, California, is a frosty winter month, with an average temperature varying between 47.1°F (8.4°C) and 31.3°F (-0.4°C). Lewiston, California, marks the onset of January with an average high-temperature of a still frosty 47.1°F (8.4°C), subtly divergent from December's 45°F (7.2°C). Weather in January »
Weather in February
February, the last month of the winter in Lewiston, is also a frosty month, with an average temperature varying between 47.7°F (8.7°C) and 30.9°F (-0.6°C). February reports an average high-temperature of a still chilly 47.7°F (8.7°C), slightly varied from January's 47.1°F (8.4°C). Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Lewiston, California, with an average temperature fluctuating between 32.4°F (0.2°C) and 50°F (10°C). Transitioning from February to March, Lewiston observes an average high-temperature of a cool 50°F (10°C), differing subtly from the previous month. Weather in March »
Weather in April
April in Lewiston, California, is a refreshing spring month, with an average temperature varying between 56.3°F (13.5°C) and 35.2°F (1.8°C). As April arrives, a slight rise in the average high-temperature is observed, moving from a fresh 50°F (10°C) in March to a moderate 56.3°F (13.5°C). Weather in April »
Weather in May
May, the last month of the spring in Lewiston, is a refreshing month, with an average temperature fluctuating between 64.9°F (18.3°C) and 39.9°F (4.4°C). The start of May signals a slight increase in the average high-temperature, moving from a mild 56.3°F (13.5°C) in April to a comfortable 64.9°F (18.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Lewiston, California, with an average temperature fluctuating between 74.7°F (23.7°C) and 45.1°F (7.3°C). As June arrives, a rise in the average high-temperature is observed, moving from a refreshing 64.9°F (18.3°C) in May to a moderately hot 74.7°F (23.7°C). Weather in June »
Weather in July
July, like June, in Lewiston, California, is a moderately hot summer month, with temperature in the range of an average low of 51.3°F (10.7°C) and an average high of 84.6°F (29.2°C). The months of July and August bring the highest temperatures, averaging a high of 84.6°F (29.2°C). In July, the heat index is estimated at a hot 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Lewiston, California, with an average temperature fluctuating between 50.7°F (10.4°C) and 84.6°F (29.2°C). Lewiston sees its peak of temperatures during July and August, with an average high-temperature of 84.6°F (29.2°C). For most parts of August, the heat index is estimated at a tropical 86°F (30°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Lewiston, California, with an average temperature fluctuating between 77.9°F (25.5°C) and 46.2°F (7.9°C). In Lewiston, the average high-temperature in September gently drops from 84.6°F (29.2°C) in August to a still warm 77.9°F (25.5°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Lewiston, California, with an average temperature ranging between max 66°F (18.9°C) and min 40.8°F (4.9°C). In Lewiston, the beginning of October is marked by a lowered average high-temperature, shifting from September's moderately hot 77.9°F (25.5°C) to an enjoyable 66°F (18.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Lewiston, California, with an average temperature fluctuating between 52.9°F (11.6°C) and 34.3°F (1.3°C). The commencement of November involves a temperature shift, with the average high-temperature dropping from a comfortable 66°F (18.9°C) in October to a cool 52.9°F (11.6°C). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Lewiston, California, with an average temperature varying between 45°F (7.2°C) and 30°F (-1.1°C). In Lewiston, December is the month with the lowest recorded average temperatures, measuring a high of 45°F (7.2°C) and a low of 30°F (-1.1°C). Weather in December »
[Resources]Frequently asked questions
How many days does it rain in Lewiston?
In Lewiston, California, during the entire year, the rain falls for 119.2 days and collects up to 33.35" (847mm) of precipitation.
When does it snow in Lewiston?
Months with snowfall in Lewiston, California, are January through April, November and December.
How much does it snow in Lewiston?
Throughout the year, in Lewiston, California, there are 21.6 snowfall days, and 28.46" (723mm) of snow is accumulated.
When is the lowest UV index in Lewiston?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Lewiston.
When does it snow the most in Lewiston?
The month with the most snowfall in Lewiston is February, when snow falls for 5.3 days and typically aggregates up to 8.35" (212mm) of snow.
What is the most humid month in Lewiston?
With an average relative humidity of 82%, March is the most humid month.
When is Daylight Saving Time (DST) in Lewiston?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
When it does not snow in Lewiston?
May through October are months without snowfall.
When are the longest days in Lewiston?
With an average of 15h and 0min of daylight, June has the longest days of the year in Lewiston.
What is the hottest time of year in Lewiston?
The highest point of temperatures falls in July and August, when the average high-temperature ascends to 84.6°F (29.2°C).
What is the driest month in Lewiston?
The months with the least rainfall in Lewiston, California, are July and August Rain falls for 3.1 days and accumulates 0.16" (4mm) of rain.
What month has the most sunshine in Lewiston?
July has the most sunshine of the year in Lewiston, California, with an average of 12h of sunshine.
What is the month with the highest UV index in Lewiston?
July is the month with the highest UV index, with an average maximum UV index of 6.
What is the least humid month in Lewiston?
With an average relative humidity of 54%, August is the least humid month in Lewiston, California.
What is the coldest month in Lewiston?
The coldest period tends to be December, when average temperatures fluctuate between a high of 45°F (7.2°C) and a low of 30°F (-1.1°C).
What is the wettest month in Lewiston?
The month with the most rainfall in Lewiston, California, is December, when the rain falls for 14.5 days and typically aggregates up to 6.14" (156mm) of precipitation.
What is the month with the shortest days in Lewiston?
With an average of 9h and 18min of daylight, December has the shortest days of the year.
What is the month with the least sunshine in Lewiston?
The month with the least sunshine in Lewiston is December, with an average of 4.6h of sunshine.
Average temperature
Lewiston, CA
The warmest months (with the highest average high temperature) are July and August (84.6°F).
The month with the lowest average high temperature is December (45°F).
The month with the highest average low temperature is July (51.3°F).
The coldest month (with the lowest average low temperature) is December (30°F).
Average pressure
Lewiston, CA
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
30.05"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.94"Hg - Average pressure in September:
29.95"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).
Average wind speed
Lewiston, CA
- Average wind speed in January:
4.3mph - Average wind speed in February:
4.7mph - Average wind speed in March:
4.8mph - Average wind speed in April:
4.8mph - Average wind speed in May:
4.3mph - Average wind speed in June:
4.3mph
- Average wind speed in July:
3.6mph - Average wind speed in August:
3.4mph - Average wind speed in September:
3.7mph - Average wind speed in October:
4.1mph - Average wind speed in November:
4.2mph - Average wind speed in December:
4.2mph
The windiest months (with the highest average wind speed) are March and April (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity
Lewiston, CA
The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is August (54%).
Average rainfall
Lewiston, CA
- Average rainfall in January:
5.94" - Average rainfall in February:
4.8" - Average rainfall in March:
5.12" - Average rainfall in April:
2.4" - Average rainfall in May:
2.2" - Average rainfall in June:
0.63"
- Average rainfall in July:
0.16" - Average rainfall in August:
0.16" - Average rainfall in September:
0.47" - Average rainfall in October:
1.85" - Average rainfall in November:
3.46" - Average rainfall in December:
6.14"
The wettest month (with the highest rainfall) is December (6.14").
The driest months (with the least rainfall) are July and August (0.16").
Average rainfall days
Lewiston, CA
- Average rainfall days in January:
14.3 days - Average rainfall days in February:
12.3 days - Average rainfall days in March:
18.3 days - Average rainfall days in April:
14.5 days - Average rainfall days in May:
11.5 days - Average rainfall days in June:
6.1 days
- Average rainfall days in July:
3.1 days - Average rainfall days in August:
2.5 days - Average rainfall days in September:
3.6 days - Average rainfall days in October:
7.6 days - Average rainfall days in November:
10.9 days - Average rainfall days in December:
14.5 days
The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is August (2.5 days).
Average snowfall
Lewiston, CA
The month with the highest snowfall is February (8.35").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Lewiston, CA
- Average snowfall days in January:
3.7 days - Average snowfall days in February:
5.3 days - Average snowfall days in March:
4.7 days - Average snowfall days in April:
1.8 days - Average snowfall days in May:
0.1 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 days - Average snowfall days in November:
1.7 days - Average snowfall days in December:
4.3 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Lewiston, CA
- 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 3min - 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:
4h and 5min - Average sunshine in February:
5h and 1min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 5min - Average sunshine in May:
10h and 1min - Average sunshine in June:
11h and 2min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 5min - Average sunshine in September:
10h and 4min - Average sunshine in October:
6h and 4min - Average sunshine in November:
5h and 5min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days
Lewiston, CA
- Average sunshine days in January:
13.5 days - Average sunshine days in February:
12.7 days - Average sunshine days in March:
10.6 days - Average sunshine days in April:
13 days - Average sunshine days in May:
17.3 days - Average sunshine days in June:
22.1 days
- Average sunshine days in July:
25.8 days - Average sunshine days in August:
26.8 days - Average sunshine days in September:
24.8 days - Average sunshine days in October:
22.1 days - Average sunshine days in November:
17.1 days - Average sunshine days in December:
13.3 days
The month with the most sunshine days is August (26.8 days).
The month with the least sunshine days is March (10.6 days).
Average UV index
Lewiston, CA
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Lewiston, CA
The month with the most cloud cover is March (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility
Lewiston, CA
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are March and December (4mi).
Lewiston, California, USA
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