Monthly outlook for Greystone, CO: average high 54.4°, average low 39°. That is 0.5° below the climate normal for October. Precipitation is expected on 5 days (about 2.1 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 11 October (65°), the coolest 16 October (27°).
54.4°/39°
Average high / low
−0.5°
Below normal
5 / 3
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
56.4°
56.9°
-0.3°
21 October – 30 October
51.1°
51°
+0.1°
31 October – 9 November
at normal
44.6°
—
October records over 66 years
78.3°1 October 2015All-time high
-9°31 October 1991All-time low
Mon, 1257° / 47°0.32
57 °
Greystone, Monday, 12 October
Rain. High 57°, low 47°.
Pressure29.77 inHg
Wind14.9 mph S
Humidity57%
Visibility2.0 mi
Dew point41°
Tue, 1354° / 40°0.06
54 °
Greystone, Tuesday, 13 October
Light rain. High 54°, low 40°.
Pressure29.88 inHg
Wind7.9 mph S
Humidity50%
Visibility6.2 mi
Dew point36°
Wed, 1445° / 38°0.72
45 °
Greystone, Wednesday, 14 October
Rain. High 45°, low 38°.
Pressure29.97 inHg
Wind7.7 mph NW
Humidity96%
Visibility2.3 mi
Dew point42°
Thu, 1545° / 38°0.53
45 °
Greystone, Thursday, 15 October
Rain. High 45°, low 38°.
Pressure30.50 inHg
Wind18.1 mph NE
Humidity66%
Visibility6.2 mi
Dew point29°
Fri, 1654° / 27°0
54 °
Greystone, Friday, 16 October
Clear. High 54°, low 27°.
Pressure30.56 inHg
Wind6.5 mph NE
Humidity50%
Visibility—
Dew point26°
Sat, 1760° / 34°0
60 °
Greystone, Saturday, 17 October
Clear. High 60°, low 34°.
Pressure30.27 inHg
Wind9.2 mph SW
Humidity45%
Visibility—
Dew point31°
Sun, 1862° / 46°0
62 °
Greystone, Sunday, 18 October
Clear. High 62°, low 46°.
Pressure30.12 inHg
Wind6.8 mph SW
Humidity36%
Visibility—
Dew point30°
Mon, 1963° / 46°0
63 °
Greystone, Monday, 19 October
Clear. High 63°, low 46°.
Pressure30.09 inHg
Wind10.7 mph SW
Humidity29%
Visibility—
Dew point25°
Tue, 2060° / 46°0.01
60 °
Greystone, Tuesday, 20 October
Light rain. High 60°, low 46°.
Pressure29.83 inHg
Wind18.6 mph SW
Humidity41%
Visibility—
Dew point33°
Wed, 2158° / 36°0
58 °
Greystone, Wednesday, 21 October
Clear. High 58°, low 36°.
Pressure29.97 inHg
Wind14.2 mph SW
Humidity27%
Visibility—
Dew point18°
Thu, 2258° / 43°0
58 °
Greystone, Thursday, 22 October
Clear. High 58°, low 43°.
Pressure29.85 inHg
Wind15.9 mph SW
Humidity30%
Visibility—
Dew point25°
Fri, 2345° / 35°0
45 °
Greystone, Friday, 23 October
Mostly clear. High 45°, low 35°.
Pressure30.24 inHg
Wind25.3 mph NE
Humidity52%
Visibility—
Dew point25°
Sat, 2443° / 31°0
43 °
Greystone, Saturday, 24 October
Clear. High 43°, low 31°.
Pressure30.39 inHg
Wind26.3 mph NE
Humidity43%
Visibility—
Dew point17°
Sun, 2548° / 30°0
48 °
Greystone, Sunday, 25 October
Clear. High 48°, low 30°.
Pressure30.27 inHg
Wind6.8 mph N
Humidity31%
Visibility—
Dew point13°
Mon, 2654° / 35°0
54 °
Greystone, Monday, 26 October
Clear. High 54°, low 35°.
Pressure30.21 inHg
Wind5.9 mph SW
Humidity28%
Visibility—
Dew point16°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Mon, 0942° / 26°0.07
42 °
Greystone, Monday, 9 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.07 in
Chance of precipitation30%
Record high58° (2016)
Record low-2° (2011)
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.