Monthly outlook for Fairmount, CO: average high 66.4°, average low 45.8°. That is 2.1° above the climate normal for October. Precipitation is expected on 2 days (about 1.1 inches), against a normal of 4 days and 0.9 inches. The warmest day looks like 8 October (81.4°), the coolest 17 October (27.9°).
66.4°/45.8°
Average high / low
+2.1°
Above normal
2 / 4
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
7 October – 16 October
70.4°
63.5°
+3.8°
17 October – 26 October
59.7°
60.3°
-0.3°
27 October – 5 November
at normal
53.4°
—
October records over 66 years
85.8°3 October 2025All-time high
-8°30 October 1993All-time low
Climate normals and records are computed from the nearest reference point — Arvada (3 mi).
Thu, 0881° / 51°0
81 °
Fairmount, Thursday, 8 October
Clear. High 81°, low 51°.
Pressure29.94 inHg
Wind7.2 mph E
Humidity17%
Visibility6.2 mi
Dew point28°
Fri, 0981° / 51°0
81 °
Fairmount, Friday, 9 October
Clear. High 81°, low 51°.
Pressure29.80 inHg
Wind4.6 mph E
Humidity17%
Visibility6.2 mi
Dew point29°
Sat, 1081° / 50°0.03
81 °
Fairmount, Saturday, 10 October
Light rain. High 81°, low 50°.
Pressure29.65 inHg
Wind7.1 mph SE
Humidity19%
Visibility6.2 mi
Dew point32°
Sun, 1173° / 57°0
73 °
Fairmount, Sunday, 11 October
Partly cloudy. High 73°, low 57°.
Pressure29.71 inHg
Wind3.4 mph SE
Humidity30%
Visibility6.2 mi
Dew point38°
Mon, 1276° / 48°0
76 °
Fairmount, Monday, 12 October
Clear. High 76°, low 48°.
Pressure29.77 inHg
Wind14.9 mph N
Humidity37%
Visibility—
Dew point40°
Tue, 1368° / 46°0
68 °
Fairmount, Tuesday, 13 October
Overcast. High 68°, low 46°.
Pressure30.06 inHg
Wind6.6 mph N
Humidity57%
Visibility—
Dew point40°
Wed, 1471° / 60°0.03
71 °
Fairmount, Wednesday, 14 October
Light rain. High 71°, low 60°.
Pressure29.53 inHg
Wind10.6 mph E
Humidity43%
Visibility—
Dew point43°
Thu, 1559° / 32°0.91
59 °
Fairmount, Thursday, 15 October
Snow. High 59°, low 32°.
Pressure29.85 inHg
Wind9.2 mph NE
Humidity91%
Visibility—
Dew point40°
Fri, 1635° / 30°0.12
35 °
Fairmount, Friday, 16 October
Light snow. High 35°, low 30°.
Pressure30.45 inHg
Wind6.8 mph E
Humidity86%
Visibility—
Dew point29°
Sat, 1748° / 28°0
48 °
Fairmount, Saturday, 17 October
Mostly clear. High 48°, low 28°.
Pressure30.24 inHg
Wind8.1 mph W
Humidity69%
Visibility—
Dew point31°
Sun, 1862° / 41°0
62 °
Fairmount, Sunday, 18 October
Overcast. High 62°, low 41°.
Pressure30.09 inHg
Wind6.8 mph W
Humidity40%
Visibility—
Dew point30°
Mon, 1964° / 48°0
64 °
Fairmount, Monday, 19 October
Clear. High 64°, low 48°.
Pressure30.12 inHg
Wind7.1 mph W
Humidity20%
Visibility—
Dew point18°
Tue, 2057° / 48°0
57 °
Fairmount, Tuesday, 20 October
Overcast. High 57°, low 48°.
Pressure30.18 inHg
Wind4 mph N
Humidity39%
Visibility—
Dew point29°
Wed, 2171° / 49°0
71 °
Fairmount, Wednesday, 21 October
Clear. High 71°, low 49°.
Pressure29.85 inHg
Wind9.1 mph W
Humidity16%
Visibility—
Dew point17°
Thu, 2257° / 41°0.02
57 °
Fairmount, Thursday, 22 October
Light rain. High 57°, low 41°.
Pressure29.65 inHg
Wind20.1 mph NW
Humidity35%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2360° / 35°0.04
60 °
Fairmount, Friday, 23 October
Climate normal for this date — 60-year average.
Average high60°
Average low35°
Average precipitation0.04 in
Chance of precipitation23%
Record high79° (2003)
Record low16° (1978)
Sat, 2459° / 35°0.05
59 °
Fairmount, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high59°
Average low35°
Average precipitation0.05 in
Chance of precipitation25%
Record high77° (2014)
Record low19° (1984)
Sun, 2559° / 34°0.07
59 °
Fairmount, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high59°
Average low34°
Average precipitation0.07 in
Chance of precipitation22%
Record high78° (2017)
Record low1° (1975)
Mon, 2657° / 34°0.08
57 °
Fairmount, Monday, 26 October
Climate normal for this date — 60-year average.
Average high57°
Average low34°
Average precipitation0.08 in
Chance of precipitation25%
Record high74° (1977)
Record low1° (2020)
Tue, 2756° / 33°0.04
56 °
Fairmount, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high56°
Average low33°
Average precipitation0.04 in
Chance of precipitation22%
Record high79° (2016)
Record low4° (2020)
Wed, 2857° / 32°0.06
57 °
Fairmount, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high57°
Average low32°
Average precipitation0.06 in
Chance of precipitation20%
Record high80° (2024)
Record low7° (1976)
Thu, 2956° / 32°0.08
56 °
Fairmount, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high56°
Average low32°
Average precipitation0.08 in
Chance of precipitation37%
Record high77° (2018)
Record low5° (1993)
Fri, 3053° / 30°0.07
53 °
Fairmount, Friday, 30 October
Climate normal for this date — 60-year average.
Average high53°
Average low30°
Average precipitation0.07 in
Chance of precipitation33%
Record high74° (2016)
Record low-8° (1993)
Sat, 3152° / 30°0.06
52 °
Fairmount, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high52°
Average low30°
Average precipitation0.06 in
Chance of precipitation30%
Record high74° (2016)
Record low4° (1991)
Sun, 0151° / 30°0.08
51 °
Fairmount, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low30°
Average precipitation0.08 in
Chance of precipitation32%
Record high70° (1988)
Record low3° (1979)
Mon, 0251° / 28°0.08
51 °
Fairmount, Monday, 2 November
Climate normal for this date — 60-year average.
Average high51°
Average low28°
Average precipitation0.08 in
Chance of precipitation28%
Record high81° (2025)
Record low4° (1991)
Tue, 0352° / 28°0.06
52 °
Fairmount, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low28°
Average precipitation0.06 in
Chance of precipitation25%
Record high71° (2020)
Record low-12° (1991)
Wed, 0453° / 28°0.03
53 °
Fairmount, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low28°
Average precipitation0.03 in
Chance of precipitation23%
Record high73° (2025)
Record low2° (2002)
Thu, 0553° / 29°0.04
53 °
Fairmount, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low29°
Average precipitation0.04 in
Chance of precipitation17%
Record high72° (2023)
Record low1° (1967)
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 Fairmount, CO 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 Fairmount, CO 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.