Monthly outlook for Calypso, MT: average high 57.2°, average low 37.7°. That is 1.5° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 23 October (80.2°), the coolest 28 October (27.8°).
57.2°/37.7°
Average high / low
+1.5°
Above normal
1 / 2
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
59.2°
56.9°
+1.3°
29 October – 7 November
53.9°
50.1°
+2.1°
8 November – 17 November
at normal
44.5°
—
October records over 66 years
92.7°1 October 2011All-time high
-14.6°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Zero (8 mi).
Tue, 2067° / 39°0
67 °
Calypso, Tuesday, 20 October
Partly cloudy. High 67°, low 39°.
Pressure30.03 inHg
Wind1.1 mph NE
Humidity50%
Visibility6.2 mi
Dew point42°
Wed, 2168° / 40°0
68 °
Calypso, Wednesday, 21 October
Overcast. High 68°, low 40°.
Pressure30.18 inHg
Wind7.5 mph SE
Humidity64%
Visibility6.2 mi
Dew point45°
Thu, 2271° / 48°0
71 °
Calypso, Thursday, 22 October
Clear. High 71°, low 48°.
Pressure29.91 inHg
Wind3 mph SW
Humidity61%
Visibility6.2 mi
Dew point49°
Fri, 2380° / 54°0.01
80 °
Calypso, Friday, 23 October
Light rain. High 80°, low 54°.
Pressure29.47 inHg
Wind18.6 mph W
Humidity49%
Visibility—
Dew point50°
Sat, 2453° / 40°0.09
53 °
Calypso, Saturday, 24 October
Light rain. High 53°, low 40°.
Pressure30.24 inHg
Wind25.3 mph W
Humidity49%
Visibility—
Dew point30°
Sun, 2552° / 37°0
52 °
Calypso, Sunday, 25 October
Mostly clear. High 52°, low 37°.
Pressure30.36 inHg
Wind10.6 mph E
Humidity31%
Visibility—
Dew point16°
Mon, 2645° / 37°0
45 °
Calypso, Monday, 26 October
Partly cloudy. High 45°, low 37°.
Pressure30.27 inHg
Wind15.5 mph NE
Humidity36%
Visibility—
Dew point17°
Tue, 2740° / 30°0
40 °
Calypso, Tuesday, 27 October
Partly cloudy. High 40°, low 30°.
Pressure30.59 inHg
Wind6.3 mph NW
Humidity50%
Visibility—
Dew point18°
Wed, 2849° / 28°0
49 °
Calypso, Wednesday, 28 October
Clear. High 49°, low 28°.
Pressure30.36 inHg
Wind4.5 mph S
Humidity33%
Visibility—
Dew point14°
Thu, 2952° / 33°0
52 °
Calypso, Thursday, 29 October
Overcast. High 52°, low 33°.
Pressure30.00 inHg
Wind9 mph N
Humidity38%
Visibility—
Dew point20°
Fri, 3048° / 31°0
48 °
Calypso, Friday, 30 October
Mostly clear. High 48°, low 31°.
Pressure30.00 inHg
Wind8.9 mph E
Humidity39%
Visibility—
Dew point18°
Sat, 3150° / 36°0
50 °
Calypso, Saturday, 31 October
Partly cloudy. High 50°, low 36°.
Pressure29.91 inHg
Wind10.4 mph NW
Humidity33%
Visibility—
Dew point18°
Sun, 0156° / 33°0
56 °
Calypso, Sunday, 1 November
Clear. High 56°, low 33°.
Pressure30.15 inHg
Wind6.7 mph SE
Humidity34%
Visibility—
Dew point20°
Mon, 0262° / 39°0
62 °
Calypso, Monday, 2 November
Overcast. High 62°, low 39°.
Pressure29.80 inHg
Wind9 mph NE
Humidity37%
Visibility—
Dew point28°
Tue, 0355° / 41°0
55 °
Calypso, Tuesday, 3 November
Overcast. High 55°, low 41°.
Pressure30.12 inHg
Wind12.1 mph NW
Humidity36%
Visibility—
Dew point24°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0451° / 32°0.02
51 °
Calypso, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low32°
Average precipitation0.02 in
Chance of precipitation17%
Record high71° (1965)
Record low12° (1991)
Thu, 0550° / 31°0.02
50 °
Calypso, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.02 in
Chance of precipitation22%
Record high69° (2020)
Record low0° (2003)
Fri, 0649° / 30°0.02
49 °
Calypso, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low30°
Average precipitation0.02 in
Chance of precipitation12%
Record high72° (2009)
Record low7° (1991)
Sat, 0748° / 30°0.02
48 °
Calypso, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.02 in
Chance of precipitation12%
Record high69° (1999)
Record low-2° (1991)
Sun, 0846° / 29°0.02
46 °
Calypso, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.02 in
Chance of precipitation20%
Record high72° (1999)
Record low-5° (2000)
Mon, 0945° / 28°0.06
45 °
Calypso, Monday, 9 November
Climate normal for this date — 60-year average.
Average high45°
Average low28°
Average precipitation0.06 in
Chance of precipitation22%
Record high69° (2016)
Record low-3° (2000)
Tue, 1044° / 26°0.05
44 °
Calypso, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high44°
Average low26°
Average precipitation0.05 in
Chance of precipitation18%
Record high68° (1989)
Record low-8° (1986)
Wed, 1143° / 25°0.01
43 °
Calypso, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high43°
Average low25°
Average precipitation0.01 in
Chance of precipitation8%
Record high65° (2016)
Record low-6° (2022)
Thu, 1245° / 26°0.02
45 °
Calypso, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.02 in
Chance of precipitation12%
Record high74° (1999)
Record low-5° (2000)
Fri, 1345° / 28°0.02
45 °
Calypso, Friday, 13 November
Climate normal for this date — 60-year average.
Average high45°
Average low28°
Average precipitation0.02 in
Chance of precipitation18%
Record high65° (2025)
Record low-11° (1986)
Sat, 1445° / 28°0.02
45 °
Calypso, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high45°
Average low28°
Average precipitation0.02 in
Chance of precipitation12%
Record high67° (1999)
Record low-13° (2014)
Sun, 1545° / 26°0.01
45 °
Calypso, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.01 in
Chance of precipitation5%
Record high65° (2001)
Record low-7° (2014)
Mon, 1645° / 27°0.01
45 °
Calypso, Monday, 16 November
Climate normal for this date — 60-year average.
Average high45°
Average low27°
Average precipitation0.01 in
Chance of precipitation15%
Record high65° (2001)
Record low-1° (2000)
Tue, 1743° / 27°0.02
43 °
Calypso, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high43°
Average low27°
Average precipitation0.02 in
Chance of precipitation15%
Record high64° (1976)
Record low-2° (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 Calypso, 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 Calypso, 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.