Monthly outlook for Greystone, CO: average high 58.5°, average low 42.4°. That is 1.5° above the climate normal for October. Precipitation is expected on 7 days (about 1.4 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 10 October (68.5°), the coolest 17 October (33.4°).
58.5°/42.4°
Average high / low
+1.5°
Above normal
7 / 3
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
58.6°
57.3°
+0.7°
20 October – 29 October
58.5°
51.9°
+3.6°
30 October – 8 November
at normal
45°
—
October records over 66 years
78.3°1 October 2015All-time high
-9°31 October 1991All-time low
Sun, 1164° / 46°0.33
64 °
Greystone, Sunday, 11 October
Light rain. High 64°, low 46°.
Pressure29.68 inHg
Wind14.3 mph S
Humidity68%
Visibility6.2 mi
Dew point49°
Mon, 1259° / 48°0.22
59 °
Greystone, Monday, 12 October
Light rain. High 59°, low 48°.
Pressure29.83 inHg
Wind13.9 mph SW
Humidity64%
Visibility2.8 mi
Dew point43°
Tue, 1357° / 44°0.17
57 °
Greystone, Tuesday, 13 October
Light rain. High 57°, low 44°.
Pressure29.85 inHg
Wind9.9 mph SW
Humidity57%
Visibility6.2 mi
Dew point41°
Wed, 1453° / 44°0.34
53 °
Greystone, Wednesday, 14 October
Light rain. High 53°, low 44°.
Pressure30.06 inHg
Wind4 mph N
Humidity89%
Visibility—
Dew point44°
Thu, 1555° / 38°0.1
55 °
Greystone, Thursday, 15 October
Light rain. High 55°, low 38°.
Pressure30.24 inHg
Wind7.1 mph N
Humidity69%
Visibility—
Dew point38°
Fri, 1646° / 35°0
46 °
Greystone, Friday, 16 October
Clear. High 46°, low 35°.
Pressure30.45 inHg
Wind13.2 mph NE
Humidity43%
Visibility—
Dew point20°
Sat, 1757° / 33°0
57 °
Greystone, Saturday, 17 October
Clear. High 57°, low 33°.
Pressure30.39 inHg
Wind6.6 mph SW
Humidity18%
Visibility—
Dew point6°
Sun, 1862° / 42°0
62 °
Greystone, Sunday, 18 October
Clear. High 62°, low 42°.
Pressure30.18 inHg
Wind10.8 mph SW
Humidity24%
Visibility—
Dew point19°
Mon, 1964° / 47°0
64 °
Greystone, Monday, 19 October
Overcast. High 64°, low 47°.
Pressure30.06 inHg
Wind7.9 mph SW
Humidity27%
Visibility—
Dew point25°
Tue, 2065° / 47°0
65 °
Greystone, Tuesday, 20 October
Clear. High 65°, low 47°.
Pressure29.97 inHg
Wind13.8 mph SW
Humidity32%
Visibility—
Dew point30°
Wed, 2162° / 43°0.11
62 °
Greystone, Wednesday, 21 October
Light rain. High 62°, low 43°.
Pressure29.80 inHg
Wind16.9 mph SW
Humidity37%
Visibility—
Dew point34°
Thu, 2252° / 35°0
52 °
Greystone, Thursday, 22 October
Partly cloudy. High 52°, low 35°.
Pressure30.24 inHg
Wind10.4 mph W
Humidity22%
Visibility—
Dew point9°
Fri, 2358° / 41°0
58 °
Greystone, Friday, 23 October
Mostly clear. High 58°, low 41°.
Pressure30.03 inHg
Wind8.6 mph W
Humidity22%
Visibility—
Dew point15°
Sat, 2456° / 41°0
56 °
Greystone, Saturday, 24 October
Overcast. High 56°, low 41°.
Pressure30.12 inHg
Wind4.4 mph N
Humidity43%
Visibility—
Dew point27°
Sun, 2559° / 44°0
59 °
Greystone, Sunday, 25 October
Overcast. High 59°, low 44°.
Pressure29.68 inHg
Wind17.9 mph SW
Humidity34%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2651° / 31°0.05
51 °
Greystone, Monday, 26 October
Climate normal for this date — 60-year average.
Average high51°
Average low31°
Average precipitation0.05 in
Chance of precipitation20%
Record high65° (1988)
Record low-4° (1997)
Tue, 2750° / 30°0.05
50 °
Greystone, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high50°
Average low30°
Average precipitation0.05 in
Chance of precipitation17%
Record high64° (2003)
Record low2° (1997)
Wed, 2850° / 30°0.07
50 °
Greystone, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high50°
Average low30°
Average precipitation0.07 in
Chance of precipitation25%
Record high66° (2016)
Record low1° (1984)
Thu, 2948° / 30°0.09
48 °
Greystone, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.09 in
Chance of precipitation30%
Record high68° (2003)
Record low0° (2019)
Fri, 3047° / 28°0.04
47 °
Greystone, Friday, 30 October
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.04 in
Chance of precipitation27%
Record high65° (2016)
Record low-6° (1971)
Sat, 3145° / 28°0.06
45 °
Greystone, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high45°
Average low28°
Average precipitation0.06 in
Chance of precipitation25%
Record high64° (2008)
Record low-9° (1991)
Sun, 0145° / 27°0.04
45 °
Greystone, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high45°
Average low27°
Average precipitation0.04 in
Chance of precipitation22%
Record high64° (2014)
Record low-9° (1972)
Mon, 0245° / 27°0.03
45 °
Greystone, Monday, 2 November
Climate normal for this date — 60-year average.
Average high45°
Average low27°
Average precipitation0.03 in
Chance of precipitation20%
Record high61° (2025)
Record low-4° (1991)
Tue, 0345° / 26°0.06
45 °
Greystone, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.06 in
Chance of precipitation18%
Record high63° (2020)
Record low-13° (1991)
Wed, 0445° / 26°0.02
45 °
Greystone, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.02 in
Chance of precipitation13%
Record high64° (2020)
Record low-7° (1994)
Thu, 0545° / 27°0.04
45 °
Greystone, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high45°
Average low27°
Average precipitation0.04 in
Chance of precipitation18%
Record high62° (2020)
Record low-3° (1961)
Fri, 0645° / 27°0.02
45 °
Greystone, Friday, 6 November
Climate normal for this date — 60-year average.
Average high45°
Average low27°
Average precipitation0.02 in
Chance of precipitation12%
Record high61° (1999)
Record low-5° (1971)
Sat, 0745° / 25°0.02
45 °
Greystone, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high45°
Average low25°
Average precipitation0.02 in
Chance of precipitation12%
Record high62° (1999)
Record low-9° (2000)
Sun, 0844° / 26°0.06
44 °
Greystone, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high44°
Average low26°
Average precipitation0.06 in
Chance of precipitation23%
Record high61° (1999)
Record low-7° (2000)
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 Greystone, 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 Greystone, 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.