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As of 11:43 MDT

Weather in Jefferson Island, MT

78°Current weather

Jefferson Island, Sunday, 9 August, 11:43

Mostly clear. Feels like 77°. High 88°, low 55°.

Pressure29.83 inHg
Wind1.9 mph N
Humidity21%
Visibility6.2 mi
Dew point35°

Two-week outlook for Jefferson Island, MT: week one averages a high of 87.4° and week two 94.5°, so week two runs 7.1° warmer than week one. Around 0.4 inches of precipitation are expected over the 14 days, across 2 wet days. The nearest weekend, August 9: 88°, dry.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (August 9 – August 15)87.4°56.2°0.4 in / 2 d—
2nd (August 16 – August 22)94.5°64.7°0.0 in / 0 d—

Weekend weather

Sun, August 9
Partly cloudy
88°55°
no precip.
Sat, August 15
Light rain
87°55°
0.02 in
Sun, August 16
Mostly clear
91°59°
no precip.
Sat, August 22
Light rain
102°63°
0.03 in
Mon, 1091° / 54°0Clear
91 °Clear

Jefferson Island, Monday, 10 August

Clear. High 91°, low 54°.

Pressure29.77 inHg
Wind3.6 mph NW
Humidity11%
Visibility6.2 mi
Dew point26°
Tue, 1195° / 60°0Clear
95 °Clear

Jefferson Island, Tuesday, 11 August

Clear. High 95°, low 60°.

Pressure29.88 inHg
Wind2.4 mph N
Humidity12%
Visibility6.2 mi
Dew point26°
Wed, 1292° / 60°0Overcast
92 °Overcast

Jefferson Island, Wednesday, 12 August

Overcast. High 92°, low 60°.

Pressure29.80 inHg
Wind7.9 mph NE
Humidity18%
Visibility6.2 mi
Dew point34°
Thu, 1381° / 55°0.06Light rain
81 °Light rain

Jefferson Island, Thursday, 13 August

Light rain. High 81°, low 55°.

Pressure29.83 inHg
Wind8.4 mph NE
Humidity49%
Visibility—
Dew point50°
Fri, 1478° / 56°0.3Rain
78 °Rain

Jefferson Island, Friday, 14 August

Rain. High 78°, low 56°.

Pressure30.00 inHg
Wind4.8 mph N
Humidity69%
Visibility—
Dew point54°
Sat, 1587° / 55°0.02Light rain
87 °Light rain

Jefferson Island, Saturday, 15 August

Light rain. High 87°, low 55°.

Pressure30.03 inHg
Wind8.9 mph NW
Humidity32%
Visibility—
Dew point44°
Sun, 1691° / 59°0Mostly clear
91 °Mostly clear

Jefferson Island, Sunday, 16 August

Mostly clear. High 91°, low 59°.

Pressure30.00 inHg
Wind5 mph NW
Humidity26%
Visibility—
Dew point43°
Mon, 1786° / 71°0Overcast
86 °Overcast

Jefferson Island, Monday, 17 August

Overcast. High 86°, low 71°.

Pressure29.94 inHg
Wind12.7 mph SW
Humidity25%
Visibility—
Dew point43°
Tue, 1891° / 63°0Clear
91 °Clear

Jefferson Island, Tuesday, 18 August

Clear. High 91°, low 63°.

Pressure30.00 inHg
Wind15.2 mph NW
Humidity22%
Visibility—
Dew point39°
Wed, 1995° / 63°0Clear
95 °Clear

Jefferson Island, Wednesday, 19 August

Clear. High 95°, low 63°.

Pressure30.00 inHg
Wind17.3 mph W
Humidity13%
Visibility—
Dew point29°
Thu, 2099° / 67°0Clear
99 °Clear

Jefferson Island, Thursday, 20 August

Clear. High 99°, low 67°.

Pressure29.91 inHg
Wind19.4 mph NW
Humidity14%
Visibility—
Dew point34°
Fri, 2198° / 67°0Clear
98 °Clear

Jefferson Island, Friday, 21 August

Clear. High 98°, low 67°.

Pressure29.88 inHg
Wind15.3 mph NW
Humidity16%
Visibility—
Dew point36°
Sat, 22102° / 63°0.03Light rain
102 °Light rain

Jefferson Island, Saturday, 22 August

Light rain. High 102°, low 63°.

Pressure29.91 inHg
Wind17.2 mph NW
Humidity11%
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 Jefferson Island, 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.