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As of 15:41 PDT

Weather in Mattawa, WA

90°Current weather

Mattawa, Saturday, 8 August, 15:41

Overcast. Feels like 86°. High 90°, low 61°.

Pressure29.83 inHg
Wind18.5 mph NW
Humidity17%
Visibility6.2 mi
Dew point39°
Sun, 0988° / 57°0Clear
88 °Clear

Mattawa, Sunday, 9 August

Clear. High 88°, low 57°.

Pressure29.85 inHg
Wind3 mph N
Humidity19%
Visibility6.2 mi
Dew point40°
Mon, 1097° / 56°0Clear
97 °Clear

Mattawa, Monday, 10 August

Clear. High 97°, low 56°.

Pressure29.88 inHg
Wind8.7 mph NW
Humidity17%
Visibility6.2 mi
Dew point37°
Tue, 1197° / 63°0Clear
97 °Clear

Mattawa, Tuesday, 11 August

Clear. High 97°, low 63°.

Pressure29.91 inHg
Wind1.9 mph N
Humidity20%
Visibility6.2 mi
Dew point40°
Wed, 1292° / 64°0Clear
92 °Clear

Mattawa, Wednesday, 12 August

Clear. High 92°, low 64°.

Pressure29.83 inHg
Wind13.9 mph NW
Humidity24%
Visibility6.2 mi
Dew point45°
Thu, 1390° / 62°0Clear
90 °Clear

Mattawa, Thursday, 13 August

Clear. High 90°, low 62°.

Pressure29.83 inHg
Wind12.7 mph W
Humidity19%
Visibility—
Dew point37°
Fri, 1492° / 62°0Clear
92 °Clear

Mattawa, Friday, 14 August

Clear. High 92°, low 62°.

Pressure29.85 inHg
Wind10.4 mph W
Humidity18%
Visibility—
Dew point38°
Sat, 1588° / 68°0Overcast
88 °Overcast

Mattawa, Saturday, 15 August

Overcast. High 88°, low 68°.

Pressure29.91 inHg
Wind13 mph SW
Humidity19%
Visibility—
Dew point39°
Sun, 1696° / 64°0Mostly clear
96 °Mostly clear

Mattawa, Sunday, 16 August

Mostly clear. High 96°, low 64°.

Pressure29.91 inHg
Wind17.9 mph NW
Humidity15%
Visibility—
Dew point36°
Mon, 1799° / 64°0Clear
99 °Clear

Mattawa, Monday, 17 August

Clear. High 99°, low 64°.

Pressure29.88 inHg
Wind13.6 mph W
Humidity11%
Visibility—
Dew point31°
Tue, 1898° / 71°0Clear
98 °Clear

Mattawa, Tuesday, 18 August

Clear. High 98°, low 71°.

Pressure29.91 inHg
Wind15.4 mph SW
Humidity10%
Visibility—
Dew point29°
Wed, 1993° / 69°0Overcast
93 °Overcast

Mattawa, Wednesday, 19 August

Overcast. High 93°, low 69°.

Pressure29.88 inHg
Wind12.6 mph W
Humidity21%
Visibility—
Dew point43°
Thu, 2097° / 65°0Clear
97 °Clear

Mattawa, Thursday, 20 August

Clear. High 97°, low 65°.

Pressure29.83 inHg
Wind14.5 mph W
Humidity18%
Visibility—
Dew point42°
Fri, 2198° / 66°0Clear
98 °Clear

Mattawa, Friday, 21 August

Clear. High 98°, low 66°.

Pressure29.85 inHg
Wind14.6 mph W
Humidity18%
Visibility—
Dew point42°
Sat, 2298° / 66°0Partly cloudy
98 °Partly cloudy

Mattawa, Saturday, 22 August

Partly cloudy. High 98°, low 66°.

Pressure29.88 inHg
Wind12.1 mph W
Humidity19%
Visibility—
Dew point43°
Sun, 23103° / 73°0.01Light rain
103 °Light rain

Mattawa, Sunday, 23 August

Light rain. High 103°, low 73°.

Pressure29.80 inHg
Wind9.9 mph W
Humidity14%
Visibility—
Dew point40°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Mattawa, WA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Mattawa, WA since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.