October weather forecastLewiston, ID
October
Weather in October
October ushers in a noticeable shift from the mild climate of September to the chillier autumn weather. The fall colors peak all over Lewiston, contrasting with the cool blue skies. Rainfall steadily increases but remains sporadic, allowing residents to enjoy crisp sunny days amid the changing leaves. The cloud cover starts to increase, leading to cooler maximum temperatures and slightly dimmed sunshine. However, atmospheric pressure remains relatively constant, keeping weather conditions stable.Temperature
The beginning of October signals a clear reduction in the average high-temperature, falling from a warm 75°F (23.9°C) in September to a moderate 59.7°F (15.4°C). Lewiston's nights in October cool down to an average low-temperature of 42.3°F (5.7°C).Humidity
In Lewiston, the average relative humidity in October is 61%.Rainfall
In Lewiston, in October, during 11.6 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Lewiston, during the entire year, the rain falls for 142.4 days and collects up to 14.21" (361mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. October is the first month it typically snows. Throughout October, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 24.2 snowfall days, and 10.16" (258mm) of snow is accumulated.Daylight
In October, the average length of the day is 10h and 53min.On the first day of October, sunrise is at 6:47 am and sunset at 6:27 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:34 pm PDT.
Sunshine
The average sunshine in October is 7.3h.UV index
The average daily maximum UV index in October is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In October, the maximum UV index of 3 suggests these recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Lewiston, ID
- Average high temperature in October: 59.7°F
The warmest month (with the highest average high temperature) is August (85.3°F).
The month with the lowest average high temperature is December (36.1°F).
- Average low temperature in October: 42.3°F
The month with the highest average low temperature is August (59.2°F).
The coldest month (with the lowest average low temperature) is December (24.4°F).
Average pressure in October
Lewiston, ID
- Average pressure in October: 30.05"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in October
Lewiston, ID
- Average wind speed in October: 4.8mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest months (with the lowest average wind speed) are July, August and September (4.3mph).
Average humidity in October
Lewiston, ID
- Average humidity in October: 61%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (38%).
Average rainfall in October
Lewiston, ID
- Average rainfall in October: 1.14"
The wettest month (with the highest rainfall) is March (1.85").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in October
Lewiston, ID
- Average rainfall days in October: 11.6 days
The month with the highest number of rainy days is March (17.6 days).
The month with the least rainy days is August (5.2 days).
Average snowfall in October
Lewiston, ID
- Average snowfall in October: 0.04"
The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in October
Lewiston, ID
- Average snowfall days in October: 0.1 days
The month with the highest number of snowfall days is December (8.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Lewiston, ID
- Average daylight in October: 10h and 54min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in October: 7h and 18min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in October
Lewiston, ID
- Average sunshine days in October: 18 days
The month with the most sunshine days is July (24 days).
The months with the least sunshine days are February and March (10.8 days).
Average UV index in October
Lewiston, ID
- Average UV index in October: 3
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in October
Lewiston, ID
- Average cloud cover in October: 29
The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in October
Lewiston, ID
- Average visibility in October: 6mi
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, February and December (5mi).
