Monthly outlook for Agency, MT: average high 54.3°, average low 38.9°. That is 1.3° above the climate normal for October. Precipitation is expected on 4 days (about 0.8 inches), against a normal of 6 days and 1.4 inches. The warmest day looks like 21 October (65.2°), the coolest 31 October (28.1°).
54.3°/38.9°
Average high / low
+1.3°
Above normal
4 / 6
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
59°
54.2°
+2.6°
28 October – 6 November
46.5°
47.4°
-0.5°
7 November – 16 November
at normal
42.8°
—
October records over 66 years
85.6°1 October 1992All-time high
-2.2°25 October 2020All-time low
Climate normals and records are computed from the nearest reference point — St. Ignatius (9 mi).
Mon, 1965° / 40°0
65 °
Agency, Monday, 19 October
Partly cloudy. High 65°, low 40°.
Pressure29.94 inHg
Wind3.2 mph N
Humidity57%
Visibility6.2 mi
Dew point40°
Tue, 2064° / 43°0
64 °
Agency, Tuesday, 20 October
Overcast. High 64°, low 43°.
Pressure30.12 inHg
Wind2.1 mph N
Humidity62%
Visibility6.2 mi
Dew point42°
Wed, 2165° / 44°0
65 °
Agency, Wednesday, 21 October
Overcast. High 65°, low 44°.
Pressure30.03 inHg
Wind3.1 mph N
Humidity64%
Visibility6.2 mi
Dew point44°
Thu, 2263° / 47°0.02
63 °
Agency, Thursday, 22 October
Light rain. High 63°, low 47°.
Pressure29.88 inHg
Wind2 mph N
Humidity63%
Visibility6.2 mi
Dew point44°
Fri, 2356° / 49°0.18
56 °
Agency, Friday, 23 October
Light rain. High 56°, low 49°.
Pressure29.83 inHg
Wind8.5 mph W
Humidity79%
Visibility—
Dew point47°
Sat, 2455° / 39°0
55 °
Agency, Saturday, 24 October
Clear. High 55°, low 39°.
Pressure30.18 inHg
Wind4.1 mph N
Humidity54%
Visibility—
Dew point32°
Sun, 2551° / 39°0.02
51 °
Agency, Sunday, 25 October
Light rain. High 51°, low 39°.
Pressure30.15 inHg
Wind6.3 mph S
Humidity58%
Visibility—
Dew point33°
Mon, 2654° / 35°0
54 °
Agency, Monday, 26 October
Partly cloudy. High 54°, low 35°.
Pressure30.12 inHg
Wind5.2 mph SW
Humidity60%
Visibility—
Dew point33°
Tue, 2755° / 38°0
55 °
Agency, Tuesday, 27 October
Partly cloudy. High 55°, low 38°.
Pressure29.83 inHg
Wind4.6 mph N
Humidity48%
Visibility—
Dew point29°
Wed, 2851° / 41°0.02
51 °
Agency, Wednesday, 28 October
Light rain. High 51°, low 41°.
Pressure29.68 inHg
Wind4.7 mph NE
Humidity59%
Visibility—
Dew point34°
Thu, 2942° / 37°0.04
42 °
Agency, Thursday, 29 October
Snow. High 42°, low 37°.
Pressure29.65 inHg
Wind3.9 mph N
Humidity79%
Visibility—
Dew point34°
Fri, 3043° / 33°0.03
43 °
Agency, Friday, 30 October
Snow. High 43°, low 33°.
Pressure30.06 inHg
Wind5.4 mph SW
Humidity66%
Visibility—
Dew point28°
Sat, 3146° / 28°0.04
46 °
Agency, Saturday, 31 October
Snow. High 46°, low 28°.
Pressure30.18 inHg
Wind6.8 mph S
Humidity56%
Visibility—
Dew point25°
Sun, 0149° / 38°0.02
49 °
Agency, Sunday, 1 November
Snow. High 49°, low 38°.
Pressure30.09 inHg
Wind8.3 mph S
Humidity81%
Visibility—
Dew point39°
Mon, 0247° / 34°0.46
47 °
Agency, Monday, 2 November
Snow. High 47°, low 34°.
Pressure29.59 inHg
Wind14.3 mph SW
Humidity76%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0347° / 31°0.06
47 °
Agency, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.06 in
Chance of precipitation30%
Record high64° (1981)
Record low0° (1973)
Wed, 0447° / 32°0.11
47 °
Agency, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high47°
Average low32°
Average precipitation0.11 in
Chance of precipitation58%
Record high61° (1980)
Record low-3° (1973)
Thu, 0546° / 32°0.11
46 °
Agency, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high46°
Average low32°
Average precipitation0.11 in
Chance of precipitation53%
Record high64° (1980)
Record low2° (2003)
Fri, 0646° / 31°0.13
46 °
Agency, Friday, 6 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.13 in
Chance of precipitation58%
Record high63° (2010)
Record low2° (2003)
Sat, 0744° / 30°0.13
44 °
Agency, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.13 in
Chance of precipitation47%
Record high58° (1978)
Record low8° (2000)
Sun, 0844° / 30°0.09
44 °
Agency, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.09 in
Chance of precipitation50%
Record high60° (2016)
Record low9° (2000)
Mon, 0944° / 30°0.1
44 °
Agency, Monday, 9 November
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.1 in
Chance of precipitation48%
Record high64° (2016)
Record low11° (1986)
Tue, 1043° / 28°0.07
43 °
Agency, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high43°
Average low28°
Average precipitation0.07 in
Chance of precipitation40%
Record high62° (2016)
Record low-10° (1986)
Wed, 1142° / 27°0.09
42 °
Agency, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high42°
Average low27°
Average precipitation0.09 in
Chance of precipitation37%
Record high61° (2016)
Record low-2° (2000)
Thu, 1242° / 28°0.11
42 °
Agency, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high42°
Average low28°
Average precipitation0.11 in
Chance of precipitation48%
Record high66° (1999)
Record low0° (1986)
Fri, 1342° / 29°0.1
42 °
Agency, Friday, 13 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.1 in
Chance of precipitation52%
Record high65° (2025)
Record low4° (2000)
Sat, 1442° / 28°0.09
42 °
Agency, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high42°
Average low28°
Average precipitation0.09 in
Chance of precipitation40%
Record high62° (1999)
Record low2° (2000)
Sun, 1543° / 27°0.04
43 °
Agency, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high43°
Average low27°
Average precipitation0.04 in
Chance of precipitation30%
Record high62° (2021)
Record low5° (2014)
Mon, 1642° / 28°0.1
42 °
Agency, Monday, 16 November
Climate normal for this date — 60-year average.
Average high42°
Average low28°
Average precipitation0.1 in
Chance of precipitation52%
Record high57° (2001)
Record low6° (1996)
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 Agency, 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 Agency, 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.