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As of 05:02 MDT

Weather in Sumner, MT

40°Current weather

Sumner, Thursday, 8 October, 05:02

Overcast. Feels like 36°. High 67°, low 40°.

Pressure30.00 inHg
Wind6.5 mph S
Humidity70%
Visibility6.2 mi
Dew point31°

Two-week outlook for Sumner, MT: week one averages a high of 57.2° and week two 55.4°, so week two runs 1.8° cooler than week one. Around 0.4 inches of precipitation are expected over the 14 days, across 2 wet days. The nearest weekend, October 10: 59°, dry.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (October 8 – October 14)57.2°38.9°0.4 in / 2 d—
2nd (October 15 – October 21)55.4°39.3°0.0 in / 0 d—

Weekend weather

Sat, October 10
Overcast
59°41°
no precip.
Sun, October 11
Snow
40°34°
0.26 in
Sat, October 17
Clear
56°33°
no precip.
Sun, October 18
Overcast
57°40°
no precip.
Fri, 0978° / 46°0Partly cloudy
78 °Partly cloudy

Sumner, Friday, 9 October

Partly cloudy. High 78°, low 46°.

Pressure29.44 inHg
Wind12.6 mph SW
Humidity21%
Visibility6.2 mi
Dew point31°
Sat, 1059° / 41°0Overcast
59 °Overcast

Sumner, Saturday, 10 October

Overcast. High 59°, low 41°.

Pressure29.74 inHg
Wind12.3 mph NW
Humidity58%
Visibility6.2 mi
Dew point34°
Sun, 1140° / 34°0.26Snow
40 °Snow

Sumner, Sunday, 11 October

Snow. High 40°, low 34°.

Pressure30.18 inHg
Wind13.3 mph NE
Humidity93%
Visibility5.4 mi
Dew point34°
Mon, 1240° / 32°0.12Light snow
40 °Light snow

Sumner, Monday, 12 October

Light snow. High 40°, low 32°.

Pressure30.21 inHg
Wind9.8 mph NE
Humidity78%
Visibility—
Dew point30°
Tue, 1350° / 30°0Clear
50 °Clear

Sumner, Tuesday, 13 October

Clear. High 50°, low 30°.

Pressure30.06 inHg
Wind10.4 mph S
Humidity64%
Visibility—
Dew point31°
Wed, 1466° / 49°0Overcast
66 °Overcast

Sumner, Wednesday, 14 October

Overcast. High 66°, low 49°.

Pressure29.35 inHg
Wind23.7 mph NW
Humidity38%
Visibility—
Dew point35°
Thu, 1546° / 36°0Overcast
46 °Overcast

Sumner, Thursday, 15 October

Overcast. High 46°, low 36°.

Pressure29.97 inHg
Wind27.6 mph N
Humidity91%
Visibility—
Dew point35°
Fri, 1645° / 31°0Clear
45 °Clear

Sumner, Friday, 16 October

Clear. High 45°, low 31°.

Pressure30.42 inHg
Wind13.1 mph NW
Humidity56%
Visibility—
Dew point25°
Sat, 1756° / 33°0Clear
56 °Clear

Sumner, Saturday, 17 October

Clear. High 56°, low 33°.

Pressure30.06 inHg
Wind16.1 mph W
Humidity48%
Visibility—
Dew point27°
Sun, 1857° / 40°0Overcast
57 °Overcast

Sumner, Sunday, 18 October

Overcast. High 57°, low 40°.

Pressure30.12 inHg
Wind18.7 mph S
Humidity38%
Visibility—
Dew point27°
Mon, 1959° / 44°0Partly cloudy
59 °Partly cloudy

Sumner, Monday, 19 October

Partly cloudy. High 59°, low 44°.

Pressure30.03 inHg
Wind12 mph NW
Humidity37%
Visibility—
Dew point28°
Tue, 2063° / 44°0Overcast
63 °Overcast

Sumner, Tuesday, 20 October

Overcast. High 63°, low 44°.

Pressure29.91 inHg
Wind16.5 mph S
Humidity43%
Visibility—
Dew point32°
Wed, 2160° / 47°0.02Light rain
60 °Light rain

Sumner, Wednesday, 21 October

Light rain. High 60°, low 47°.

Pressure29.29 inHg
Wind25.5 mph W
Humidity32%
Visibility—
Dew point27°

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.