Monthly outlook for Sunnyvale, TX: average high 79.8°, average low 64.5°. That is 4.9° above the climate normal for October. Precipitation is expected on 5 days (about 4.0 inches), against a normal of 4 days and 2.3 inches. The warmest day looks like 4 November (84.9°), the coolest 23 October (55.2°).
79.8°/64.5°
Average high / low
+4.9°
Above normal
5 / 4
Wet days / normal
4.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
23 October – 1 November
77.5°
72.4°
+2.8°
2 November – 11 November
83.6°
68.4°
+8.4°
12 November – 21 November
at normal
65.3°
—
October records over 66 years
97.7°1 October 1977All-time high
30.2°31 October 1993All-time low
Climate normals and records are computed from the nearest reference point — Mesquite (3 mi).
Sat, 2484° / 56°0
84 °
Sunnyvale, Saturday, 24 October
Overcast. High 84°, low 56°.
Pressure30.24 inHg
Wind4.5 mph SE
Humidity43%
Visibility6.2 mi
Dew point53°
Sun, 2578° / 61°0
78 °
Sunnyvale, Sunday, 25 October
Overcast. High 78°, low 61°.
Pressure30.33 inHg
Wind4.1 mph SE
Humidity53%
Visibility6.2 mi
Dew point57°
Mon, 2678° / 60°0
78 °
Sunnyvale, Monday, 26 October
Partly cloudy. High 78°, low 60°.
Pressure30.27 inHg
Wind4.5 mph SE
Humidity40%
Visibility6.2 mi
Dew point49°
Tue, 2778° / 62°0
78 °
Sunnyvale, Tuesday, 27 October
Overcast. High 78°, low 62°.
Pressure30.18 inHg
Wind3.6 mph S
Humidity40%
Visibility6.2 mi
Dew point47°
Wed, 2882° / 61°0
82 °
Sunnyvale, Wednesday, 28 October
Clear. High 82°, low 61°.
Pressure30.12 inHg
Wind6 mph S
Humidity35%
Visibility—
Dew point47°
Thu, 2978° / 67°0.6
78 °
Sunnyvale, Thursday, 29 October
Rain. High 78°, low 67°.
Pressure30.09 inHg
Wind12.5 mph SE
Humidity68%
Visibility—
Dew point64°
Fri, 3068° / 66°2.98
68 °
Sunnyvale, Friday, 30 October
Heavy rain. High 68°, low 66°.
Pressure29.94 inHg
Wind14.8 mph SE
Humidity96%
Visibility—
Dew point66°
Sat, 3170° / 63°0
70 °
Sunnyvale, Saturday, 31 October
Overcast. High 70°, low 63°.
Pressure30.00 inHg
Wind6.3 mph N
Humidity78%
Visibility—
Dew point61°
Sun, 0175° / 63°0
75 °
Sunnyvale, Sunday, 1 November
Overcast. High 75°, low 63°.
Pressure30.06 inHg
Wind6.5 mph SE
Humidity69%
Visibility—
Dew point61°
Mon, 0282° / 69°0.01
82 °
Sunnyvale, Monday, 2 November
Light rain. High 82°, low 69°.
Pressure29.91 inHg
Wind15.6 mph S
Humidity67%
Visibility—
Dew point67°
Tue, 0383° / 73°0.13
83 °
Sunnyvale, Tuesday, 3 November
Light rain. High 83°, low 73°.
Pressure29.77 inHg
Wind16.5 mph SW
Humidity65%
Visibility—
Dew point69°
Wed, 0485° / 69°0.12
85 °
Sunnyvale, Wednesday, 4 November
Light rain. High 85°, low 69°.
Pressure29.83 inHg
Wind10.8 mph SW
Humidity51%
Visibility—
Dew point60°
Thu, 0583° / 72°0.18
83 °
Sunnyvale, Thursday, 5 November
Light rain. High 83°, low 72°.
Pressure29.94 inHg
Wind11.4 mph S
Humidity68%
Visibility—
Dew point70°
Fri, 0684° / 67°0
84 °
Sunnyvale, Friday, 6 November
Clear. High 84°, low 67°.
Pressure30.03 inHg
Wind6.1 mph SW
Humidity33%
Visibility—
Dew point47°
Sat, 0784° / 71°0
84 °
Sunnyvale, Saturday, 7 November
Partly cloudy. High 84°, low 71°.
Pressure30.00 inHg
Wind5.7 mph N
Humidity34%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0868° / 53°0.15
68 °
Sunnyvale, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high68°
Average low53°
Average precipitation0.15 in
Chance of precipitation25%
Record high85° (1980)
Record low30° (1991)
Mon, 0969° / 53°0.09
69 °
Sunnyvale, Monday, 9 November
Climate normal for this date — 60-year average.
Average high69°
Average low53°
Average precipitation0.09 in
Chance of precipitation32%
Record high86° (2005)
Record low31° (1991)
Tue, 1068° / 51°0.11
68 °
Sunnyvale, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high68°
Average low51°
Average precipitation0.11 in
Chance of precipitation22%
Record high81° (1980)
Record low34° (1960)
Wed, 1167° / 49°0.09
67 °
Sunnyvale, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high67°
Average low49°
Average precipitation0.09 in
Chance of precipitation20%
Record high80° (1999)
Record low33° (2019)
Thu, 1265° / 49°0.07
65 °
Sunnyvale, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high65°
Average low49°
Average precipitation0.07 in
Chance of precipitation28%
Record high80° (1999)
Record low23° (2019)
Fri, 1365° / 49°0.08
65 °
Sunnyvale, Friday, 13 November
Climate normal for this date — 60-year average.
Average high65°
Average low49°
Average precipitation0.08 in
Chance of precipitation15%
Record high81° (2011)
Record low26° (2019)
Sat, 1466° / 51°0.05
66 °
Sunnyvale, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high66°
Average low51°
Average precipitation0.05 in
Chance of precipitation17%
Record high86° (1989)
Record low26° (2018)
Sun, 1566° / 49°0.09
66 °
Sunnyvale, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high66°
Average low49°
Average precipitation0.09 in
Chance of precipitation23%
Record high86° (2025)
Record low30° (2018)
Mon, 1665° / 48°0.11
65 °
Sunnyvale, Monday, 16 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.11 in
Chance of precipitation28%
Record high81° (2025)
Record low30° (1997)
Tue, 1766° / 49°0.14
66 °
Sunnyvale, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high66°
Average low49°
Average precipitation0.14 in
Chance of precipitation23%
Record high86° (2025)
Record low28° (2014)
Wed, 1866° / 49°0.1
66 °
Sunnyvale, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high66°
Average low49°
Average precipitation0.1 in
Chance of precipitation22%
Record high86° (2025)
Record low28° (2014)
Thu, 1965° / 50°0.13
65 °
Sunnyvale, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high65°
Average low50°
Average precipitation0.13 in
Chance of precipitation23%
Record high83° (2025)
Record low34° (1968)
Fri, 2065° / 49°0.11
65 °
Sunnyvale, Friday, 20 November
Climate normal for this date — 60-year average.
Average high65°
Average low49°
Average precipitation0.11 in
Chance of precipitation17%
Record high79° (2007)
Record low32° (2022)
Sat, 2165° / 48°0.08
65 °
Sunnyvale, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.08 in
Chance of precipitation23%
Record high79° (1999)
Record low30° (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 Sunnyvale, TX 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 Sunnyvale, TX 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.