2024 Compare Climate & Weather:
Lewiston, ID vs Riverton, WY
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Highlights
On average, there are 231 sunny days per year in Riverton. Lewiston averages 169 sunny days per year. The US average is 205 sunny days.
Riverton, Wyoming gets 9.5 inches of rain, on average, per year. Lewiston, Idaho gets 15.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.
Riverton averages 46.4 inches of snow per year. Lewiston averages 12.5 inches of snow per year. The US average is 27.8 inches of snow per year.
Weather Highlights
Riverton, Wyoming
Summer High: the July high is around 87.3 degrees
Winter Low: the January low is 6
Rain: averages 9.5 inches of rain a year
Snow: averages 46.4 inches of snow a year
Lewiston, Idaho
Summer High: the July high is around 88.3 degrees
Winter Low: the January low is 28.5
Rain: averages 15.8 inches of rain a year
Snow: averages 12.5 inches of snow a year
BESTPLACES COMFORT INDEX
RivertonThe annual BestPlaces Comfort Index for Riverton is 6.9 (10=best), which means it is more comfortable than most places in Wyoming.
6.9 / 10
June, August and July are the most pleasant months in Riverton, while December and January are the least comfortable months.
LewistonThe annual BestPlaces Comfort Index for Lewiston is 7.2 (10=best), which means it is one of the most pleasant places in Idaho.
7.2 / 10
June, September and August are the most pleasant months in Lewiston, while December and January are the least comfortable months.
Today's Weather - Lewiston, ID
5 PM PST
Slight Chance Rain Showers
64°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| This Afternoon | Slight Chance Rain Showers | 66° / 43° | W 21 mph |
| Saturday | Sunny then Slight Chance Rain Showers | 70° / 44° | SW 3 to 16 mph |
| Sunday | Chance Rain Showers | 64° / 45° | W 12 mph |
| Monday | Slight Chance Rain Showers | 70° / 47° | W 3 to 9 mph |
| Tuesday | Mostly Sunny then Chance Rain Showers | 73° / 52° | SW 3 to 10 mph |
| Wednesday | Rain Showers Likely | 65° / 46° | W 6 to 10 mph |
| Thursday | Chance Rain Showers | 66° / 46° | NW 3 to 7 mph |
Average Monthly High / Low (°F)
| Month | Lewiston, ID | Riverton, WY |
|---|
| January | 41° / 29° | 32° / 6° |
| February | 46° / 30° | 38° / 10° |
| March | 54° / 34° | 49° / 21° |
| April | 62° / 39° | 59° / 29° |
| May | 70° / 46° | 68° / 39° |
| June | 78° / 52° | 79° / 47° |
| July | 88° / 58° | 87° / 53° |
| August | 88° / 57° | 86° / 51° |
| September | 78° / 49° | 74° / 41° |
| October | 62° / 40° | 59° / 30° |
| November | 48° / 33° | 43° / 17° |
| December | 39° / 27° | 32° / 6° |
Hot, Freezing, Rainy, Snowy Days: Lewiston / Riverton
| Month | Hot Days | Freezing Days | Rainy Days | Snowy Days |
|---|
| January | 0 / 0 | 20 / 31 | 12 / 2 | 3 / 3 |
| February | 0 / 0 | 16 / 28 | 10 / 2 | 2 / 4 |
| March | 0 / 0 | 11 / 28 | 12 / 3 | 1 / 4 |
| April | 0 / 0 | 4 / 20 | 11 / 5 | 0 / 3 |
| May | 1 / 0 | 1 / 5 | 11 / 6 | 0 / 1 |
| June | 4 / 3 | 0 / 0 | 9 / 5 | 0 / 0 |
| July | 15 / 12 | 0 / 0 | 5 / 4 | 0 / 0 |
| August | 14 / 9 | 0 / 0 | 4 / 4 | 0 / 0 |
| September | 4 / 1 | 0 / 4 | 5 / 4 | 0 / 0 |
| October | 0 / 0 | 4 / 19 | 8 / 3 | 0 / 2 |
| November | 0 / 0 | 12 / 28 | 13 / 3 | 1 / 3 |
| December | 0 / 0 | 22 / 31 | 12 / 2 | 4 / 4 |
July is the hottest month for Lewiston with an average high temperature of 88.3°, which ranks it as warmer than most places in Idaho. In Lewiston, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Lewiston are September, June and May.
July is the hottest month for Riverton with an average high temperature of 87.3°, which ranks it as warmer than most places in Wyoming. In Riverton, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Riverton are June, September and August.
December has the coldest nighttime temperatures for Lewiston with an average of 27.1°. This is one of the warmest places in Idaho.
December has the coldest nighttime temperatures for Riverton with an average of 5.8°. This is colder than most places in Wyoming.
In Lewiston, there are 36.8 days annually when the high temperature is over 90°, which is hotter than most places in Idaho.
In Riverton, there are 25.1 days annually when the high temperature is over 90°, which is hotter than most places in Wyoming.
In Lewiston, there are 88.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Idaho.
In Riverton, there are 194.3 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Wyoming.
In Lewiston, there are 0.9 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Idaho.
In Riverton, there are 27.0 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Wyoming.
November is the wettest month in Lewiston with 1.8 inches of rain, and the driest month is July with 0.7 inches. The wettest season is Summer with 31% of yearly precipitation and 17% occurs in Autumn, which is the driest season. The annual rainfall of 15.8 inches in Lewiston means that it is about average compared to other places in Idaho.
May is the wettest month in Riverton with 1.7 inches of rain, and the driest month is January with 0.3 inches. The wettest season is Summer with 38% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 9.5 inches in Riverton means that it is drier than most places in Wyoming.
November is the rainiest month in Lewiston with 12.8 days of rain, and August is the driest month with only 4.2 rainy days. There are 110.4 rainy days annually in Lewiston, which is rainier than most places in Idaho. The rainiest season is Spring when it rains 30% of the time and the driest is Autumn with only a 16% chance of a rainy day.
May is the rainiest month in Riverton with 6.4 days of rain, and December is the driest month with only 2.2 rainy days. There are 44.5 rainy days annually in Riverton, which is one of the least rainy places in Wyoming. The rainiest season is Summer when it rains 32% of the time and the driest is Spring with only a 16% chance of a rainy day.
An annual snowfall of 12.5 inches in Lewiston means that it is one of the least snowy places in Idaho.
An annual snowfall of 46.4 inches in Riverton means that it is about average compared to other places in Wyoming.
December is the snowiest month in Lewiston with 4.5 inches of snow, and 5 months of the year have significant snowfall.
March is the snowiest month in Riverton with 8.2 inches of snow, and 9 months of the year have significant snowfall.
DID YOU KNOW?
Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.
Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.
Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.
Reviews for Lewiston 
2 Reviews
Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More
Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More
Start Your Review of Lewiston
Reviews for Riverton 2 Reviews
Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More
Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More
Start Your Review of Riverton
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