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As of 14:13 MDT

Weather in Summit Valley, MT

86°Current weather

Summit Valley, Saturday, 8 August, 14:13

Clear. Feels like 83°. High 87°, low 55°.

Pressure29.80 inHg
Wind14.8 mph W
Humidity18%
Visibility6.2 mi
Dew point37°
Sun, 0985° / 54°0Mostly clear
85 °Mostly clear

Summit Valley, Sunday, 9 August

Mostly clear. High 85°, low 54°.

Pressure29.85 inHg
Wind7.7 mph NE
Humidity13%
Visibility6.2 mi
Dew point27°
Mon, 1095° / 52°0Clear
95 °Clear

Summit Valley, Monday, 10 August

Clear. High 95°, low 52°.

Pressure29.83 inHg
Wind6.2 mph N
Humidity13%
Visibility6.2 mi
Dew point28°
Tue, 1192° / 60°0Clear
92 °Clear

Summit Valley, Tuesday, 11 August

Clear. High 92°, low 60°.

Pressure29.91 inHg
Wind8.3 mph NE
Humidity12%
Visibility6.2 mi
Dew point25°
Wed, 1292° / 60°0Clear
92 °Clear

Summit Valley, Wednesday, 12 August

Clear. High 92°, low 60°.

Pressure29.80 inHg
Wind8.3 mph NE
Humidity17%
Visibility6.2 mi
Dew point34°
Thu, 1393° / 58°0Light rain
93 °Light rain

Summit Valley, Thursday, 13 August

Light rain. High 93°, low 58°.

Pressure29.83 inHg
Wind7.9 mph NE
Humidity23%
Visibility—
Dew point37°
Fri, 1491° / 69°0Overcast
91 °Overcast

Summit Valley, Friday, 14 August

Overcast. High 91°, low 69°.

Pressure29.80 inHg
Wind12.8 mph NE
Humidity14%
Visibility—
Dew point31°
Sat, 1583° / 60°0.06Light rain
83 °Light rain

Summit Valley, Saturday, 15 August

Light rain. High 83°, low 60°.

Pressure30.00 inHg
Wind18.8 mph NW
Humidity31%
Visibility—
Dew point43°
Sun, 1683° / 57°0Clear
83 °Clear

Summit Valley, Sunday, 16 August

Clear. High 83°, low 57°.

Pressure30.00 inHg
Wind15.7 mph SW
Humidity23%
Visibility—
Dew point38°
Mon, 1792° / 60°0Overcast
92 °Overcast

Summit Valley, Monday, 17 August

Overcast. High 92°, low 60°.

Pressure30.00 inHg
Wind9.5 mph N
Humidity17%
Visibility—
Dew point32°
Tue, 1883° / 61°0.01Light rain
83 °Light rain

Summit Valley, Tuesday, 18 August

Light rain. High 83°, low 61°.

Pressure29.91 inHg
Wind28.7 mph W
Humidity20%
Visibility—
Dew point35°
Wed, 1985° / 54°0Clear
85 °Clear

Summit Valley, Wednesday, 19 August

Clear. High 85°, low 54°.

Pressure30.03 inHg
Wind10.5 mph NE
Humidity28%
Visibility—
Dew point38°
Thu, 2092° / 59°0Partly cloudy
92 °Partly cloudy

Summit Valley, Thursday, 20 August

Partly cloudy. High 92°, low 59°.

Pressure29.91 inHg
Wind6.7 mph N
Humidity16%
Visibility—
Dew point31°
Fri, 2194° / 64°0Clear
94 °Clear

Summit Valley, Friday, 21 August

Clear. High 94°, low 64°.

Pressure29.88 inHg
Wind10.7 mph NW
Humidity15%
Visibility—
Dew point31°
Sat, 2294° / 63°0Clear
94 °Clear

Summit Valley, Saturday, 22 August

Clear. High 94°, low 63°.

Pressure29.91 inHg
Wind14.2 mph NE
Humidity19%
Visibility—
Dew point36°
Sun, 2393° / 63°0Partly cloudy
93 °Partly cloudy

Summit Valley, Sunday, 23 August

Partly cloudy. High 93°, low 63°.

Pressure30.00 inHg
Wind12.1 mph NE
Humidity26%
Visibility—
Dew point43°

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 Summit Valley, MT 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 Summit Valley, MT 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.