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As of 15:35 MDT

Weather in Summit, MT

83°Current weather

Summit, Saturday, 8 August, 15:35

Clear. Feels like 80°. High 83°, low 46°.

Pressure29.80 inHg
Wind15.2 mph W
Humidity12%
Visibility6.2 mi
Dew point26°
Sun, 0977° / 45°0Overcast
77 °Overcast

Summit, Sunday, 9 August

Overcast. High 77°, low 45°.

Pressure29.85 inHg
Wind8 mph NW
Humidity11%
Visibility6.2 mi
Dew point21°
Mon, 1085° / 43°0Clear
85 °Clear

Summit, Monday, 10 August

Clear. High 85°, low 43°.

Pressure29.83 inHg
Wind15.4 mph W
Humidity10%
Visibility6.2 mi
Dew point20°
Tue, 1182° / 47°0Clear
82 °Clear

Summit, Tuesday, 11 August

Clear. High 82°, low 47°.

Pressure29.91 inHg
Wind9 mph W
Humidity9%
Visibility6.2 mi
Dew point18°
Wed, 1281° / 48°0Partly cloudy
81 °Partly cloudy

Summit, Wednesday, 12 August

Partly cloudy. High 81°, low 48°.

Pressure29.80 inHg
Wind4.2 mph NW
Humidity12%
Visibility6.2 mi
Dew point24°
Thu, 1381° / 47°0.02Light rain
81 °Light rain

Summit, Thursday, 13 August

Light rain. High 81°, low 47°.

Pressure29.77 inHg
Wind11 mph W
Humidity14%
Visibility—
Dew point21°
Fri, 1482° / 56°0Overcast
82 °Overcast

Summit, Friday, 14 August

Overcast. High 82°, low 56°.

Pressure29.83 inHg
Wind18.8 mph SW
Humidity15%
Visibility—
Dew point24°
Sat, 1572° / 54°0.07Light rain
72 °Light rain

Summit, Saturday, 15 August

Light rain. High 72°, low 54°.

Pressure30.00 inHg
Wind14.9 mph W
Humidity34%
Visibility—
Dew point38°
Sun, 1678° / 47°0.06Light rain
78 °Light rain

Summit, Sunday, 16 August

Light rain. High 78°, low 47°.

Pressure30.03 inHg
Wind10.8 mph W
Humidity20%
Visibility—
Dew point28°
Mon, 1782° / 52°0Overcast
82 °Overcast

Summit, Monday, 17 August

Overcast. High 82°, low 52°.

Pressure30.03 inHg
Wind15 mph W
Humidity12%
Visibility—
Dew point19°
Tue, 1878° / 54°0Overcast
78 °Overcast

Summit, Tuesday, 18 August

Overcast. High 78°, low 54°.

Pressure29.88 inHg
Wind17.3 mph W
Humidity18%
Visibility—
Dew point28°
Wed, 1976° / 44°0Clear
76 °Clear

Summit, Wednesday, 19 August

Clear. High 76°, low 44°.

Pressure30.06 inHg
Wind6.8 mph NW
Humidity30%
Visibility—
Dew point30°
Thu, 2082° / 49°0Overcast
82 °Overcast

Summit, Thursday, 20 August

Overcast. High 82°, low 49°.

Pressure29.91 inHg
Wind10.5 mph W
Humidity14%
Visibility—
Dew point21°
Fri, 2185° / 54°0Clear
85 °Clear

Summit, Friday, 21 August

Clear. High 85°, low 54°.

Pressure29.88 inHg
Wind11.1 mph NW
Humidity13%
Visibility—
Dew point22°
Sat, 2285° / 51°0Mostly clear
85 °Mostly clear

Summit, Saturday, 22 August

Mostly clear. High 85°, low 51°.

Pressure29.91 inHg
Wind11.1 mph NW
Humidity14%
Visibility—
Dew point23°
Sun, 2385° / 53°0Overcast
85 °Overcast

Summit, Sunday, 23 August

Overcast. High 85°, low 53°.

Pressure29.97 inHg
Wind15.6 mph NE
Humidity21%
Visibility—
Dew point32°

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, 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, 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.