Prosser, WA Weather Forecast | 5 Day
Updated: Fri Sep 18th 2026 6:00 PM PDT
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Sunny
Fri 9-18-26
Sunny with a high of 78°F and a low of 60°F. There's a very small chance of rainfall, only about 2%. Winds will be light at 6mph and gusts of 14.3mph at 9 PM. Humidity levels should be comfortable, sitting around 39% on average, the maximum being 43% at 11 PM and 31% being its lowest at 7 PM. Barometric pressure is its highest of 30.01inHg at 9 PM, a lowest point of 29.98inHg at 7 PM with an avg 30inHg.
- HI: 78°F
- LO: 60°F
- Rainfall: 2%
- Snowfall: 0%
- Wind
5.4 mph - Humidity
39% avg. - UV Index
5 - Air QualityGood
- Sunrise
06:41 AM - Sunset
07:05 PM - Moonrise
03:29 PM - Moonset
11:17 PM - Moon Phase
First Quarter
Sunny
Weather Tomorrow, Sat 9-19-26
Sunny with a high of 81°F and a low of 59°F. There's a very small chance of rainfall, only about 2%. Winds will be light at 6mph and gusts of 17.2mph at 4 PM. Humidity levels should be comfortable, sitting around 37% on average, the maximum being 54% at 7 AM and 22% being its lowest at 5 PM. Barometric pressure is its highest of 30.04inHg at 7 AM, a lowest point of 29.93inHg at 7 PM with an avg 29.99inHg.
- HI: 81°F
- LO: 59°F
- Rainfall: 2%
- Snowfall: 0%
- Wind
6 mph - Humidity
37% avg. - UV Index
5 - Air QualityGood
- Sunrise
06:42 AM - Sunset
07:03 PM - Moonrise
04:11 PM - Moonset
Does not set today - Moon Phase
First Quarter
Sunny
Sun 9-20-26
Sunny with a high of 82°F and a low of 60°F. There's a very small chance of rainfall, only about 1%. Winds will be light at 4mph and gusts of 15.2mph at 5 PM. Humidity levels should be comfortable, sitting around 31% on average, the maximum being 48% at 7 AM and 17% being its lowest at 4 PM. Barometric pressure is its highest of 30inHg at 8 AM, a lowest point of 29.88inHg at 7 PM with an avg 29.94inHg.
- HI: 82°F
- LO: 60°F
- Rainfall: 1%
- Snowfall: 0%
- Wind
4 mph - Humidity
31% avg. - UV Index
4.9 - Air QualityGood
- Sunrise
06:43 AM - Sunset
07:01 PM - Moonrise
04:44 PM - Moonset
12:20 AM - Moon Phase
Waxing Gibbous
Sunny
Mon 9-21-26
Sunny with a high of 83°F and a low of 61°F. There's a very small chance of rainfall, only about 2%. Winds will be light at 6mph and gusts of 16.1mph at 3 AM. The air will be relatively dry with average humidity levels below 30%, the maximum being 42% at 7 AM and 18% being its lowest at 3 PM. Barometric pressure is its highest of 29.93inHg at 8 AM, a lowest point of 29.81inHg at 7 PM with an avg 29.87inHg.
- HI: 83°F
- LO: 61°F
- Rainfall: 2%
- Snowfall: 0%
- Wind
6 mph - Humidity
29% avg. - UV Index
4.7 - Air QualityGood
- Sunrise
06:44 AM - Sunset
06:59 PM - Moonrise
05:10 PM - Moonset
01:26 AM - Moon Phase
Waxing Gibbous
Overcast
Tue 9-22-26
Overcast with a high of 77°F and a low of 57°F. There's a very small chance of rainfall, only about 4%. Winds will be light at 6mph and gusts of 16.3mph at 2 AM. Humidity levels should be comfortable, sitting around 35% on average, the maximum being 57% at 7 AM and 19% being its lowest at 4 PM. Barometric pressure is its highest of 29.93inHg at 9 AM, a lowest point of 29.83inHg at 6 PM with an avg 29.88inHg.
- HI: 77°F
- LO: 57°F
- Rainfall: 4%
- Snowfall: 0%
- Wind
5.4 mph - Humidity
35% avg. - UV Index
6 - Air QualityGood
- Sunrise
06:46 AM - Sunset
06:57 PM - Moonrise
05:30 PM - Moonset
02:33 AM - Moon Phase
Waxing Gibbous
Overcast
Wed 9-23-26
Overcast with a high of 76°F and a low of 56°F. There's a very small chance of rainfall, only about 5%. Winds will be light at 7mph and gusts of 15.7mph at 8 PM. Humidity levels should be comfortable, sitting around 38% on average, the maximum being 60% at 5 AM and 20% being its lowest at 5 PM. Barometric pressure is its highest of 29.99inHg at 11 AM, a lowest point of 29.88inHg at 5 PM with an avg 29.94inHg.
- HI: 76°F
- LO: 56°F
- Rainfall: 5%
- Snowfall: 0%
- Wind
6.7 mph - Humidity
38% avg. - UV Index
6 - Air QualityTBA
- Sunrise
06:47 AM - Sunset
06:55 PM - Moonrise
05:48 PM - Moonset
03:40 AM - Moon Phase
Waxing Gibbous
This 5-Day weather forecast is valid for ZIP code 99350, accurately covering the area of Prosser, WA.
Currently
|
77°F |
29.96 inHg.
Barometer 26%
Humidity SSW 4.3 mph Wind |
| Sunny | ||
National Outlook
Heavy Rain in North-Central U.S. & Scorching Heat in South-Central U.S. - 09-18 to 09-20
Fri Sep 18th 2026, 5:45am PDT
Read
Wet Weather with Possible Flood Concerns in the Southern Regions 09-21 to 09-25
Extended Forecast
Fri Sep 18th 2026, 5:56am PDT
Read
Fri Sep 18th 2026, 5:56am PDT
5 Day Forecast Nearby
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