Weather forecast for 10 daysMerna, WY
Weather forecast for the weekend
Sunday Oct 18, 2026
- 59°F
- 25°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 5mphNNW 345°
- Humidity: 41%
- UV index: 4
- Sunrise: 7:38 am MDT
- Sunset: 6:34 pm MDT
- details ▼
Tomorrow, on Sunday, October 18, mainly sunny skies with just a few high clouds are also anticipated.
The temperature is forecasted to vary significantly from a high of a moderate 59°F to a low of a freezing 24.8°F.
Tomorrow, the expected temperature appears higher and closer to September's norm of 66.4°F.
Sunrise will be at 7:38 am and sunset at 6:34 pm; tomorrow's daylight will last for 10h and 55min.
The temperature is forecasted to vary significantly from a high of a moderate 59°F to a low of a freezing 24.8°F.
Tomorrow, the expected temperature appears higher and closer to September's norm of 66.4°F.
Sunrise will be at 7:38 am and sunset at 6:34 pm; tomorrow's daylight will last for 10h and 55min.
10-day overview
Daily temperatures
Warmest day: tomorrow 59°C.
Coldest period: Friday - Saturday 43°C.
Coldest period: Friday - Saturday 43°C.
Chance of precipitation
Highest chance: Friday 79%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- min.
- 25°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 4mphNW 317°
- Humidity: 61%
- UV index: 0
- Sunrise: 7:37 am MDT
- Sunset: 6:35 pm MDT
- details ▼
- Sunday
- Oct 18, 2026
- 59°F
- 25°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 5mphNNW 345°
- Humidity: 41%
- UV index: 4
- Sunrise: 7:38 am MDT
- Sunset: 6:34 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 57°F
- 30°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 6mphSE 141°
- Humidity: 52%
- UV index: 4
- Sunrise: 7:40 am MDT
- Sunset: 6:32 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 57°F
- 32°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 6mphS 186°
- Humidity: 62%
- UV index: 4
- Sunrise: 7:41 am MDT
- Sunset: 6:30 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 57°F
- 34°F
Mostly Sunny
- Precip. probability: 10%
- Precipitation: 0"
- Wind: 8mphSE 140°
- Humidity: 71%
- UV index: 3
- Sunrise: 7:42 am MDT
- Sunset: 6:29 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 54°F
- 36°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0.12"
- Wind: 9mphSE 132°
- Humidity: 80%
- UV index: 3
- Sunrise: 7:43 am MDT
- Sunset: 6:27 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 43°F
- 27°F
Rain
- Precip. probability: 79%
- Precipitation: 0.35"
- Wind: 8mphSSW 209°
- Humidity: 92%
- UV index: 1
- Sunrise: 7:44 am MDT
- Sunset: 6:26 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 43°F
- 25°F
Partly Cloudy
- Precip. probability: 23%
- Precipitation: 0"
- Wind: 6mphWSW 250°
- Humidity: 72%
- UV index: 3
- Sunrise: 7:46 am MDT
- Sunset: 6:24 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 46°F
- 28°F
Partly Cloudy
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 7mphSE 140°
- Humidity: 70%
- UV index: 3
- Sunrise: 7:47 am MDT
- Sunset: 6:23 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 48°F
- 28°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 7mphSSE 150°
- Humidity: 68%
- UV index: 3
- Sunrise: 7:48 am MDT
- Sunset: 6:21 pm MDT
- details ▼
Looking ahead, conditions suggest a period of overcast, clear and rainy weather is predicted.
Rainfall is anticipated on Thursday and Friday.
Expect a substantial fluctuation in daytime highs in the upcoming period. Highs will range from 42.8°F to 59°F, while the low temperature range extends from 24.8°F to 35.6°F.
The warmest day will be Sunday, with a maximum of 59°F; Friday and next Saturday, with the highest temperature of 42.8°F, will be the coldest days.
Rainfall is anticipated on Thursday and Friday.
Expect a substantial fluctuation in daytime highs in the upcoming period. Highs will range from 42.8°F to 59°F, while the low temperature range extends from 24.8°F to 35.6°F.
The warmest day will be Sunday, with a maximum of 59°F; Friday and next Saturday, with the highest temperature of 42.8°F, will be the coldest days.
Updated: Oct 18, 2026 @ 01:18:55 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
Tomorrow, mostly sunny skies are expected.
Tomorrow, the maximum temperature will be 59°F, while the minimum temperature will be 24.8°F.
Tomorrow, the highest temperature will be noticeably higher than the average maximum of 49.1°F in October. The lowest temperature tomorrow will be slightly cooler than the average low temperature.
Tomorrow, the highest temperature will be noticeably higher than the average maximum of 49.1°F in October. The lowest temperature tomorrow will be slightly cooler than the average low temperature.
On Sunday, in Merna, sunrise will be at 7:38 am and sunset at 6:34 pm (MDT).
In Merna, tomorrow, there will be 10h and 55min of daylight.
