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As of 11:29 MDT

Weather in Sumner, MT

60°Current weather

Sumner, Thursday, 8 October, 11:29

Overcast. Feels like 58°. High 64°, low 40°.

Pressure30.00 inHg
Wind5.9 mph NW
Humidity43%
Visibility6.2 mi
Dew point37°

Two-week outlook for Sumner, MT: week one averages a high of 54.8° and week two 53.3°, so week two runs 1.5° cooler than week one. Around 0.5 inches of precipitation are expected over the 14 days, across 2 wet days. The nearest weekend, October 10: 57°, dry.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (October 8 – October 14)54.8°38°0.5 in / 2 d—
2nd (October 15 – October 21)53.3°37.3°0.0 in / 0 d—

Weekend weather

Sat, October 10
Light rain
57°40°
no precip.
Sun, October 11
Snow
39°35°
0.2 in
Sat, October 17
Clear
57°35°
no precip.
Sun, October 18
Clear
56°38°
no precip.
Fri, 0978° / 45°0Partly cloudy
78 °Partly cloudy

Sumner, Friday, 9 October

Partly cloudy. High 78°, low 45°.

Pressure29.47 inHg
Wind11.8 mph SW
Humidity23%
Visibility6.2 mi
Dew point33°
Sat, 1057° / 40°0Light rain
57 °Light rain

Sumner, Saturday, 10 October

Light rain. High 57°, low 40°.

Pressure29.80 inHg
Wind12.6 mph NW
Humidity63%
Visibility6.2 mi
Dew point34°
Sun, 1139° / 35°0.2Snow
39 °Snow

Sumner, Sunday, 11 October

Snow. High 39°, low 35°.

Pressure30.21 inHg
Wind12.6 mph NE
Humidity92%
Visibility4.5 mi
Dew point34°
Mon, 1239° / 33°0.27Snow
39 °Snow

Sumner, Monday, 12 October

Snow. High 39°, low 33°.

Pressure30.18 inHg
Wind10.8 mph NE
Humidity96%
Visibility—
Dew point33°
Tue, 1346° / 34°0Overcast
46 °Overcast

Sumner, Tuesday, 13 October

Overcast. High 46°, low 34°.

Pressure30.15 inHg
Wind8.8 mph S
Humidity70%
Visibility—
Dew point31°
Wed, 1461° / 39°0Clear
61 °Clear

Sumner, Wednesday, 14 October

Clear. High 61°, low 39°.

Pressure29.56 inHg
Wind22.1 mph N
Humidity35%
Visibility—
Dew point29°
Thu, 1541° / 35°0Overcast
41 °Overcast

Sumner, Thursday, 15 October

Overcast. High 41°, low 35°.

Pressure30.33 inHg
Wind28.4 mph N
Humidity71%
Visibility—
Dew point26°
Fri, 1647° / 27°0Clear
47 °Clear

Sumner, Friday, 16 October

Clear. High 47°, low 27°.

Pressure30.56 inHg
Wind13.7 mph S
Humidity41%
Visibility—
Dew point18°
Sat, 1757° / 35°0Clear
57 °Clear

Sumner, Saturday, 17 October

Clear. High 57°, low 35°.

Pressure30.09 inHg
Wind22.7 mph S
Humidity36%
Visibility—
Dew point23°
Sun, 1856° / 38°0Clear
56 °Clear

Sumner, Sunday, 18 October

Clear. High 56°, low 38°.

Pressure29.97 inHg
Wind11.5 mph NW
Humidity39%
Visibility—
Dew point26°
Mon, 1962° / 40°0Overcast
62 °Overcast

Sumner, Monday, 19 October

Overcast. High 62°, low 40°.

Pressure29.85 inHg
Wind26.4 mph W
Humidity27%
Visibility—
Dew point24°
Tue, 2061° / 45°0Overcast
61 °Overcast

Sumner, Tuesday, 20 October

Overcast. High 61°, low 45°.

Pressure30.15 inHg
Wind9.5 mph W
Humidity33%
Visibility—
Dew point27°
Wed, 2149° / 41°0Overcast
49 °Overcast

Sumner, Wednesday, 21 October

Overcast. High 49°, low 41°.

Pressure30.09 inHg
Wind32.5 mph NW
Humidity49%
Visibility—
Dew point28°

About this forecast

Can I plan a trip on a 2-week forecast?

Week one is solid for planning — accuracy is high. Week two shows the trend: go by the averages and the comparison with normal, and check the details closer to the date.

What does the "Vs normal" column mean?

It is the gap between the forecast and the climate normal for those same dates in Sumner, MT, computed over 60 years. A positive value means the week runs warmer than usual.

Why are weekends shown separately?

Saturday and Sunday plans are what people check most, so we give them their own cards with temperature and precipitation.