Monthly outlook for Sunnyside, CO: average high 53.2°, average low 33.4°. That is 2.8° below the climate normal for October. Precipitation is expected on 4 days (about 1.7 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 17 October (68°), the coolest 1 November (14°).
53.2°/33.4°
Average high / low
−2.8°
Below normal
4 / 4
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
56.2°
60.6°
-2.4°
27 October – 5 November
48.3°
53.6°
-3°
6 November – 15 November
at normal
50.9°
—
October records over 66 years
85.1°2 October 2024All-time high
-5.8°30 October 1993All-time low
Climate normals and records are computed from the nearest reference point — Boulder (7 mi).
Sun, 1867° / 39°0
67 °
Sunnyside, Sunday, 18 October
Overcast. High 67°, low 39°.
Pressure30.03 inHg
Wind5.9 mph E
Humidity28%
Visibility6.2 mi
Dew point24°
Mon, 1954° / 41°0.03
54 °
Sunnyside, Monday, 19 October
Light rain. High 54°, low 41°.
Pressure30.09 inHg
Wind4.9 mph E
Humidity45%
Visibility6.2 mi
Dew point32°
Tue, 2059° / 36°0
59 °
Sunnyside, Tuesday, 20 October
Mostly clear. High 59°, low 36°.
Pressure30.03 inHg
Wind4.5 mph E
Humidity43%
Visibility6.2 mi
Dew point37°
Wed, 2161° / 37°0
61 °
Sunnyside, Wednesday, 21 October
Mostly clear. High 61°, low 37°.
Pressure30.15 inHg
Wind5.5 mph E
Humidity37%
Visibility—
Dew point31°
Thu, 2260° / 43°0.01
60 °
Sunnyside, Thursday, 22 October
Light rain. High 60°, low 43°.
Pressure30.03 inHg
Wind8.9 mph W
Humidity47%
Visibility—
Dew point38°
Fri, 2358° / 41°0.02
58 °
Sunnyside, Friday, 23 October
Light rain. High 58°, low 41°.
Pressure29.68 inHg
Wind20 mph W
Humidity27%
Visibility—
Dew point21°
Sat, 2444° / 32°0.39
44 °
Sunnyside, Saturday, 24 October
Snow. High 44°, low 32°.
Pressure30.03 inHg
Wind10 mph W
Humidity80%
Visibility—
Dew point34°
Sun, 2540° / 22°0.1
40 °
Sunnyside, Sunday, 25 October
Snow. High 40°, low 22°.
Pressure30.24 inHg
Wind8.6 mph W
Humidity77%
Visibility—
Dew point27°
Mon, 2651° / 26°0
51 °
Sunnyside, Monday, 26 October
Mostly clear. High 51°, low 26°.
Pressure30.00 inHg
Wind10.5 mph W
Humidity36%
Visibility—
Dew point20°
Tue, 2754° / 39°0
54 °
Sunnyside, Tuesday, 27 October
Overcast. High 54°, low 39°.
Pressure29.74 inHg
Wind10.5 mph W
Humidity39%
Visibility—
Dew point26°
Wed, 2849° / 38°0
49 °
Sunnyside, Wednesday, 28 October
Clear. High 49°, low 38°.
Pressure29.94 inHg
Wind33.2 mph W
Humidity26%
Visibility—
Dew point12°
Thu, 2959° / 35°0
59 °
Sunnyside, Thursday, 29 October
Partly cloudy. High 59°, low 35°.
Pressure29.91 inHg
Wind13 mph W
Humidity14%
Visibility—
Dew point7°
Fri, 3055° / 40°0.09
55 °
Sunnyside, Friday, 30 October
Light rain. High 55°, low 40°.
Pressure29.47 inHg
Wind9.5 mph W
Humidity35%
Visibility—
Dew point26°
Sat, 3137° / 21°1.06
37 °
Sunnyside, Saturday, 31 October
Snow. High 37°, low 21°.
Pressure29.77 inHg
Wind8.6 mph W
Humidity82%
Visibility—
Dew point26°
Sun, 0136° / 14°0
36 °
Sunnyside, Sunday, 1 November
Clear. High 36°, low 14°.
Pressure30.15 inHg
Wind13.6 mph W
Humidity77%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0251° / 28°0.08
51 °
Sunnyside, Monday, 2 November
Climate normal for this date — 60-year average.
Average high51°
Average low28°
Average precipitation0.08 in
Chance of precipitation27%
Record high78° (2025)
Record low3° (1991)
Tue, 0352° / 28°0.06
52 °
Sunnyside, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low28°
Average precipitation0.06 in
Chance of precipitation25%
Record high70° (2020)
Record low-12° (1991)
Wed, 0453° / 28°0.04
53 °
Sunnyside, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low28°
Average precipitation0.04 in
Chance of precipitation20%
Record high73° (2025)
Record low4° (2002)
Thu, 0553° / 29°0.03
53 °
Sunnyside, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low29°
Average precipitation0.03 in
Chance of precipitation20%
Record high71° (2023)
Record low2° (1967)
Fri, 0654° / 29°0.04
54 °
Sunnyside, Friday, 6 November
Climate normal for this date — 60-year average.
Average high54°
Average low29°
Average precipitation0.04 in
Chance of precipitation17%
Record high74° (2010)
Record low1° (1961)
Sat, 0754° / 29°0.02
54 °
Sunnyside, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high54°
Average low29°
Average precipitation0.02 in
Chance of precipitation15%
Record high72° (2021)
Record low5° (2000)
Sun, 0853° / 29°0.06
53 °
Sunnyside, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low29°
Average precipitation0.06 in
Chance of precipitation27%
Record high71° (1978)
Record low5° (1993)
Mon, 0951° / 28°0.08
51 °
Sunnyside, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low28°
Average precipitation0.08 in
Chance of precipitation28%
Record high70° (2016)
Record low9° (2000)
Tue, 1051° / 26°0.04
51 °
Sunnyside, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high51°
Average low26°
Average precipitation0.04 in
Chance of precipitation27%
Record high72° (2025)
Record low9° (1998)
Wed, 1149° / 26°0.04
49 °
Sunnyside, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high49°
Average low26°
Average precipitation0.04 in
Chance of precipitation27%
Record high68° (2025)
Record low5° (1998)
Thu, 1249° / 25°0.04
49 °
Sunnyside, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high49°
Average low25°
Average precipitation0.04 in
Chance of precipitation25%
Record high69° (1989)
Record low-2° (2014)
Fri, 1351° / 27°0.04
51 °
Sunnyside, Friday, 13 November
Climate normal for this date — 60-year average.
Average high51°
Average low27°
Average precipitation0.04 in
Chance of precipitation18%
Record high70° (2025)
Record low-5° (2014)
Sat, 1449° / 26°0.07
49 °
Sunnyside, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high49°
Average low26°
Average precipitation0.07 in
Chance of precipitation32%
Record high74° (2025)
Record low-2° (1961)
Sun, 1549° / 24°0.05
49 °
Sunnyside, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high49°
Average low24°
Average precipitation0.05 in
Chance of precipitation18%
Record high73° (2016)
Record low-12° (1997)
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 Sunnyside, 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 Sunnyside, 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.