Monthly outlook for Thornton, CA: average high 76.4°, average low 52.6°. That is 1.7° above the climate normal for October. Precipitation is expected on 2 days (about 0.1 inches), against a normal of 2 days and 0.9 inches. The warmest day looks like 17 October (91.8°), the coolest 29 October (46.6°).
76.4°/52.6°
Average high / low
+1.7°
Above normal
2 / 2
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
77.5°
75°
+1.4°
26 October – 4 November
74.6°
70°
+2.5°
5 November – 14 November
at normal
65.2°
—
October records over 66 years
103.1°2 October 2024All-time high
36.3°31 October 2023All-time low
Climate normals and records are computed from the nearest reference point — Elk Grove (13 mi).
Sat, 1792° / 56°0
92 °
Thornton, Saturday, 17 October
Clear. High 92°, low 56°.
Pressure30.06 inHg
Wind1.7 mph NW
Humidity18%
Visibility6.2 mi
Dew point36°
Sun, 1884° / 58°0
84 °
Thornton, Sunday, 18 October
Clear. High 84°, low 58°.
Pressure29.94 inHg
Wind7 mph SW
Humidity32%
Visibility6.2 mi
Dew point48°
Mon, 1970° / 53°0.02
70 °
Thornton, Monday, 19 October
Light rain. High 70°, low 53°.
Pressure29.91 inHg
Wind9.5 mph SW
Humidity42%
Visibility6.2 mi
Dew point41°
Tue, 2064° / 55°0.06
64 °
Thornton, Tuesday, 20 October
Light rain. High 64°, low 55°.
Pressure29.85 inHg
Wind4.6 mph N
Humidity77%
Visibility—
Dew point51°
Wed, 2171° / 53°0.05
71 °
Thornton, Wednesday, 21 October
Light rain. High 71°, low 53°.
Pressure29.94 inHg
Wind9.3 mph NE
Humidity65%
Visibility—
Dew point50°
Thu, 2277° / 56°0
77 °
Thornton, Thursday, 22 October
Overcast. High 77°, low 56°.
Pressure29.94 inHg
Wind11 mph W
Humidity43%
Visibility—
Dew point44°
Fri, 2373° / 53°0
73 °
Thornton, Friday, 23 October
Overcast. High 73°, low 53°.
Pressure30.03 inHg
Wind7.9 mph W
Humidity54%
Visibility—
Dew point47°
Sat, 2477° / 51°0
77 °
Thornton, Saturday, 24 October
Clear. High 77°, low 51°.
Pressure30.12 inHg
Wind10 mph NW
Humidity21%
Visibility—
Dew point23°
Sun, 2576° / 49°0
76 °
Thornton, Sunday, 25 October
Overcast. High 76°, low 49°.
Pressure30.15 inHg
Wind5.5 mph N
Humidity21%
Visibility—
Dew point23°
Mon, 2679° / 51°0
79 °
Thornton, Monday, 26 October
Overcast. High 79°, low 51°.
Pressure30.00 inHg
Wind6.9 mph NW
Humidity13%
Visibility—
Dew point14°
Tue, 2777° / 53°0
77 °
Thornton, Tuesday, 27 October
Overcast. High 77°, low 53°.
Pressure29.88 inHg
Wind10.6 mph SW
Humidity22%
Visibility—
Dew point26°
Wed, 2872° / 51°0
72 °
Thornton, Wednesday, 28 October
Clear. High 72°, low 51°.
Pressure29.97 inHg
Wind20.9 mph N
Humidity28%
Visibility—
Dew point30°
Thu, 2973° / 47°0
73 °
Thornton, Thursday, 29 October
Mostly clear. High 73°, low 47°.
Pressure30.12 inHg
Wind14.2 mph NW
Humidity25%
Visibility—
Dew point24°
Fri, 3077° / 48°0
77 °
Thornton, Friday, 30 October
Overcast. High 77°, low 48°.
Pressure30.18 inHg
Wind6.7 mph SE
Humidity17%
Visibility—
Dew point19°
Sat, 3169° / 52°0
69 °
Thornton, Saturday, 31 October
Overcast. High 69°, low 52°.
Pressure30.06 inHg
Wind11.1 mph W
Humidity28%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0170° / 48°0.04
70 °
Thornton, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high70°
Average low48°
Average precipitation0.04 in
Chance of precipitation15%
Record high82° (1997)
Record low36° (2023)
Mon, 0269° / 48°0.07
69 °
Thornton, Monday, 2 November
Climate normal for this date — 60-year average.
Average high69°
Average low48°
Average precipitation0.07 in
Chance of precipitation17%
Record high82° (1967)
Record low38° (2019)
Tue, 0369° / 48°0.06
69 °
Thornton, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high69°
Average low48°
Average precipitation0.06 in
Chance of precipitation15%
Record high85° (2018)
Record low38° (2019)
Wed, 0469° / 48°0.04
69 °
Thornton, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high69°
Average low48°
Average precipitation0.04 in
Chance of precipitation17%
Record high80° (1976)
Record low38° (1973)
Thu, 0568° / 48°0.07
68 °
Thornton, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high68°
Average low48°
Average precipitation0.07 in
Chance of precipitation13%
Record high80° (2020)
Record low39° (2011)
Fri, 0667° / 49°0.07
67 °
Thornton, Friday, 6 November
Climate normal for this date — 60-year average.
Average high67°
Average low49°
Average precipitation0.07 in
Chance of precipitation15%
Record high79° (1976)
Record low41° (1996)
Sat, 0767° / 48°0.07
67 °
Thornton, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high67°
Average low48°
Average precipitation0.07 in
Chance of precipitation25%
Record high78° (1991)
Record low39° (2011)
Sun, 0866° / 47°0.08
66 °
Thornton, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high66°
Average low47°
Average precipitation0.08 in
Chance of precipitation17%
Record high77° (1990)
Record low39° (2021)
Mon, 0965° / 46°0.1
65 °
Thornton, Monday, 9 November
Climate normal for this date — 60-year average.
Average high65°
Average low46°
Average precipitation0.1 in
Chance of precipitation23%
Record high77° (1976)
Record low37° (1982)
Tue, 1064° / 46°0.12
64 °
Thornton, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high64°
Average low46°
Average precipitation0.12 in
Chance of precipitation33%
Record high78° (1990)
Record low33° (2020)
Wed, 1164° / 46°0.12
64 °
Thornton, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high64°
Average low46°
Average precipitation0.12 in
Chance of precipitation30%
Record high78° (1990)
Record low33° (2018)
Thu, 1264° / 45°0.1
64 °
Thornton, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high64°
Average low45°
Average precipitation0.1 in
Chance of precipitation23%
Record high77° (1990)
Record low33° (2018)
Fri, 1364° / 46°0.14
64 °
Thornton, Friday, 13 November
Climate normal for this date — 60-year average.
Average high64°
Average low46°
Average precipitation0.14 in
Chance of precipitation30%
Record high79° (2013)
Record low33° (1985)
Sat, 1464° / 46°0.08
64 °
Thornton, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high64°
Average low46°
Average precipitation0.08 in
Chance of precipitation20%
Record high77° (2008)
Record low32° (1985)
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 Thornton, CA 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 Thornton, CA 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.