As of 11:59 MDT

Weather in Chester, MT

68°

Chester, Thursday, 8 October, 11:59

Partly cloudy. Feels like 66°. High 72°, low 41°.

Pressure30.00 inHg

Wind3 mph W

Humidity37%

Visibility6.2 mi

Dew point41°

See detailed hourly forecast

Monthly outlook for Chester, MT: average high 53.3°, average low 36.7°. That is 1.7° below the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 9 October (77.5°), the coolest 13 October (28.5°).

53.3°/36.7°

Average high / low

−1.7°

Below normal

3 / 2

Wet days / normal

0.5 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	52.8°	56.9°	-2.3°
18 October – 27 October	54.2°	54°	+0.1°
28 October – 6 November	at normal	47.1°	—

October records over 66 years

86°7 October 1980All-time high

-13.9°30 October 1991All-time low

Fri, 0978° / 46°

78 °

Chester, Friday, 9 October

Overcast. High 78°, low 46°.

Pressure29.44 inHg

Wind15.4 mph SW

Humidity25%

Visibility6.2 mi

Dew point34°

Sat, 1056° / 35°

0.06

56 °

Chester, Saturday, 10 October

Light snow. High 56°, low 35°.

Pressure29.85 inHg

Wind9 mph N

Humidity59%

Visibility6.2 mi

Dew point27°

Sun, 1135° / 33°

0.26

35 °

Chester, Sunday, 11 October

Snow. High 35°, low 33°.

Pressure30.21 inHg

Wind13 mph NE

Humidity90%

Visibility3.7 mi

Dew point31°

Mon, 1239° / 32°

0.08

39 °

Chester, Monday, 12 October

Light snow. High 39°, low 32°.

Pressure30.15 inHg

Wind9.4 mph NE

Humidity86%

Visibility—

Dew point31°

Tue, 1348° / 29°

48 °

Chester, Tuesday, 13 October

Mostly clear. High 48°, low 29°.

Pressure30.12 inHg

Wind6.2 mph S

Humidity71%

Visibility—

Dew point31°

Wed, 1456° / 39°

56 °

Chester, Wednesday, 14 October

Overcast. High 56°, low 39°.

Pressure29.62 inHg

Wind20.1 mph N

Humidity42%

Visibility—

Dew point31°

Thu, 1539° / 32°

0.02

39 °

Chester, Thursday, 15 October

Light snow. High 39°, low 32°.

Pressure30.47 inHg

Wind20.9 mph N

Humidity61%

Visibility—

Dew point24°

Fri, 1649° / 29°

49 °

Chester, Friday, 16 October

Clear. High 49°, low 29°.

Pressure30.50 inHg

Wind12.9 mph S

Humidity40%

Visibility—

Dew point18°

Sat, 1757° / 32°

57 °

Chester, Saturday, 17 October

Clear. High 57°, low 32°.

Pressure30.06 inHg

Wind13.4 mph S

Humidity31%

Visibility—

Dew point18°

Sun, 1858° / 41°

58 °

Chester, Sunday, 18 October

Clear. High 58°, low 41°.

Pressure30.03 inHg

Wind11.1 mph NW

Humidity35%

Visibility—

Dew point25°

Mon, 1962° / 44°

62 °

Chester, Monday, 19 October

Mostly clear. High 62°, low 44°.

Pressure29.94 inHg

Wind24.2 mph W

Humidity30%

Visibility—

Dew point27°

Tue, 2061° / 45°

61 °

Chester, Tuesday, 20 October

Mostly clear. High 61°, low 45°.

Pressure30.18 inHg

Wind10.3 mph W

Humidity42%

Visibility—

Dew point31°

Wed, 2155° / 42°

55 °

Chester, Wednesday, 21 October

Light rain. High 55°, low 42°.

Pressure30.27 inHg

Wind28.3 mph NW

Humidity34%

Visibility—

Dew point21°

Thu, 2247° / 36°

0.02

47 °

Chester, Thursday, 22 October

Light rain. High 47°, low 36°.

Pressure30.00 inHg

Wind14.4 mph S

Humidity37%

Visibility—

Dew point20°

Fri, 2342° / 30°

0.01

42 °

Chester, Friday, 23 October

Light snow. High 42°, low 30°.

Pressure29.97 inHg

Wind19.1 mph N

Humidity74%

Visibility—

Dew point28°

From day 17 onward the outlook is built from 60-year climate statistics

Sat, 2453° / 34°

0.03

53 °

Chester, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high53°

Average low34°

Average precipitation0.03 in

Chance of precipitation15%

Record high76° (2007)

Record low3° (2020)

Sun, 2553° / 35°

0.01

53 °

Chester, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high53°

Average low35°

Average precipitation0.01 in

Chance of precipitation8%

Record high74° (1990)

Record low-6° (2020)

Mon, 2651° / 33°

0.03

51 °

Chester, Monday, 26 October

Climate normal for this date — 60-year average.

Average high51°

Average low33°

Average precipitation0.03 in

Chance of precipitation20%

Record high71° (1983)

Record low-1° (2020)

Tue, 2751° / 32°

0.03

51 °

Chester, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high51°

Average low32°

Average precipitation0.03 in

Chance of precipitation15%

Record high69° (2001)

Record low6° (2023)

Wed, 2849° / 31°

0.02

49 °

Chester, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high49°

Average low31°

Average precipitation0.02 in

Chance of precipitation13%

Record high69° (1987)

Record low-3° (1991)

Thu, 2948° / 31°

0.02

48 °

Chester, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high48°

Average low31°

Average precipitation0.02 in

Chance of precipitation13%

Record high72° (2008)

Record low-11° (1991)

Fri, 3048° / 30°

0.01

48 °

Chester, Friday, 30 October

Climate normal for this date — 60-year average.

Average high48°

Average low30°

Average precipitation0.01 in

Chance of precipitation7%

Record high68° (1983)

Record low-14° (1991)

Sat, 3147° / 30°

0.04

47 °

Chester, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high47°

Average low30°

Average precipitation0.04 in

Chance of precipitation23%

Record high64° (1983)

Record low-5° (1984)

Sun, 0147° / 30°

0.01

47 °

Chester, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high47°

Average low30°

Average precipitation0.01 in

Chance of precipitation7%

Record high69° (2025)

Record low-9° (1984)

Mon, 0247° / 30°

0.02

47 °

Chester, Monday, 2 November

Climate normal for this date — 60-year average.

Average high47°

Average low30°

Average precipitation0.02 in

Chance of precipitation17%

Record high65° (1981)

Record low-18° (1991)

Tue, 0348° / 30°

0.02

48 °

Chester, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high48°

Average low30°

Average precipitation0.02 in

Chance of precipitation12%

Record high67° (1981)

Record low-2° (1991)

Wed, 0447° / 31°

0.03

47 °

Chester, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high47°

Average low31°

Average precipitation0.03 in

Chance of precipitation17%

Record high67° (2001)

Record low5° (2003)

Thu, 0546° / 29°

0.03

46 °

Chester, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high46°

Average low29°

Average precipitation0.03 in

Chance of precipitation22%

Record high68° (2010)

Record low-8° (2003)

Fri, 0644° / 28°

0.02

44 °

Chester, Friday, 6 November

Climate normal for this date — 60-year average.

Average high44°

Average low28°

Average precipitation0.02 in

Chance of precipitation15%

Record high67° (2010)

Record low2° (2003)

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 Chester, 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 Chester, 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.