Monthly outlook for Calypso, MT: average high 60.2°, average low 40.3°. That is 2.2° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 22 October (74°), the coolest 16 October (28.5°).
60.2°/40.3°
Average high / low
+2.2°
Above normal
1 / 2
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
64.1°
58.2°
+3.3°
26 October – 4 November
53.6°
51.7°
+1.1°
5 November – 14 November
at normal
45.9°
—
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).
Sat, 1774° / 39°0
74 °
Calypso, Saturday, 17 October
Mostly clear. High 74°, low 39°.
Pressure29.97 inHg
Wind11.7 mph SW
Humidity33%
Visibility6.2 mi
Dew point35°
Sun, 1863° / 46°0
63 °
Calypso, Sunday, 18 October
Overcast. High 63°, low 46°.
Pressure30.12 inHg
Wind8.7 mph NE
Humidity34%
Visibility6.2 mi
Dew point30°
Mon, 1968° / 42°0
68 °
Calypso, Monday, 19 October
Clear. High 68°, low 42°.
Pressure30.00 inHg
Wind9.2 mph SE
Humidity50%
Visibility6.2 mi
Dew point42°
Tue, 2068° / 46°0
68 °
Calypso, Tuesday, 20 October
Clear. High 68°, low 46°.
Pressure29.88 inHg
Wind10.2 mph NW
Humidity55%
Visibility—
Dew point45°
Wed, 2162° / 45°0
62 °
Calypso, Wednesday, 21 October
Clear. High 62°, low 45°.
Pressure30.18 inHg
Wind8.7 mph NW
Humidity72%
Visibility—
Dew point46°
Thu, 2274° / 47°0
74 °
Calypso, Thursday, 22 October
Partly cloudy. High 74°, low 47°.
Pressure29.94 inHg
Wind18.4 mph SE
Humidity29%
Visibility—
Dew point32°
Fri, 2373° / 41°0.03
73 °
Calypso, Friday, 23 October
Light rain. High 73°, low 41°.
Pressure29.50 inHg
Wind27.1 mph W
Humidity49%
Visibility—
Dew point51°
Sat, 2448° / 39°0.04
48 °
Calypso, Saturday, 24 October
Light rain. High 48°, low 39°.
Pressure30.24 inHg
Wind29.7 mph W
Humidity41%
Visibility—
Dew point23°
Sun, 2549° / 34°0
49 °
Calypso, Sunday, 25 October
Clear. High 49°, low 34°.
Pressure30.30 inHg
Wind8.2 mph E
Humidity36%
Visibility—
Dew point19°
Mon, 2651° / 33°0
51 °
Calypso, Monday, 26 October
Overcast. High 51°, low 33°.
Pressure30.21 inHg
Wind11 mph SE
Humidity35%
Visibility—
Dew point19°
Tue, 2759° / 36°0
59 °
Calypso, Tuesday, 27 October
Clear. High 59°, low 36°.
Pressure29.88 inHg
Wind9.1 mph E
Humidity47%
Visibility—
Dew point30°
Wed, 2852° / 41°0
52 °
Calypso, Wednesday, 28 October
Overcast. High 52°, low 41°.
Pressure29.83 inHg
Wind9.2 mph E
Humidity77%
Visibility—
Dew point40°
Thu, 2953° / 44°0
53 °
Calypso, Thursday, 29 October
Overcast. High 53°, low 44°.
Pressure29.97 inHg
Wind12 mph NW
Humidity59%
Visibility—
Dew point35°
Fri, 3055° / 43°0
55 °
Calypso, Friday, 30 October
Overcast. High 55°, low 43°.
Pressure30.27 inHg
Wind8.1 mph NE
Humidity57%
Visibility—
Dew point36°
Sat, 3153° / 40°0
53 °
Calypso, Saturday, 31 October
Overcast. High 53°, low 40°.
Pressure30.24 inHg
Wind14.2 mph SE
Humidity55%
Visibility—
Dew point33°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0150° / 33°0.02
50 °
Calypso, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high50°
Average low33°
Average precipitation0.02 in
Chance of precipitation10%
Record high72° (1965)
Record low4° (1984)
Mon, 0250° / 32°0.02
50 °
Calypso, Monday, 2 November
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.02 in
Chance of precipitation8%
Record high74° (1965)
Record low-3° (1991)
Tue, 0349° / 32°0.02
49 °
Calypso, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.02 in
Chance of precipitation17%
Record high69° (1983)
Record low-8° (1991)
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)
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.