Monthly outlook for Spanish Flat, CA: average high 69.6°, average low 49.5°. That is 2.4° below the climate normal for October. Precipitation is expected on 5 days (about 0.8 inches), against a normal of 2 days and 1.1 inches. The warmest day looks like 17 October (87.2°), the coolest 19 October (37°).
69.6°/49.5°
Average high / low
−2.4°
Below normal
5 / 2
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
73.9°
75.5°
-0.9°
27 October – 5 November
62.5°
71°
-4.7°
6 November – 15 November
at normal
66°
—
October records over 66 years
106°1 October 2020All-time high
39.7°29 October 1971All-time low
Climate normals and records are computed from the nearest reference point — St. Helena (13 mi).
Sun, 1876° / 44°0
76 °
Spanish Flat, Sunday, 18 October
Clear. High 76°, low 44°.
Pressure29.97 inHg
Wind4.8 mph SW
Humidity27%
Visibility6.2 mi
Dew point42°
Mon, 1967° / 37°0.02
67 °
Spanish Flat, Monday, 19 October
Light rain. High 67°, low 37°.
Pressure29.94 inHg
Wind6.9 mph SW
Humidity53%
Visibility6.2 mi
Dew point44°
Tue, 2064° / 51°0.06
64 °
Spanish Flat, Tuesday, 20 October
Light rain. High 64°, low 51°.
Pressure29.88 inHg
Wind3.2 mph E
Humidity61%
Visibility6.2 mi
Dew point46°
Wed, 2168° / 55°0.2
68 °
Spanish Flat, Wednesday, 21 October
Rain. High 68°, low 55°.
Pressure29.94 inHg
Wind2.1 mph SW
Humidity66%
Visibility6.2 mi
Dew point51°
Thu, 2272° / 53°0
72 °
Spanish Flat, Thursday, 22 October
Clear. High 72°, low 53°.
Pressure30.00 inHg
Wind5.2 mph W
Humidity61%
Visibility—
Dew point50°
Fri, 2376° / 53°0
76 °
Spanish Flat, Friday, 23 October
Clear. High 76°, low 53°.
Pressure30.03 inHg
Wind7.2 mph SW
Humidity53%
Visibility—
Dew point49°
Sat, 2475° / 51°0
75 °
Spanish Flat, Saturday, 24 October
Clear. High 75°, low 51°.
Pressure30.03 inHg
Wind4.3 mph S
Humidity45%
Visibility—
Dew point44°
Sun, 2573° / 55°0
73 °
Spanish Flat, Sunday, 25 October
Overcast. High 73°, low 55°.
Pressure29.94 inHg
Wind3.7 mph NE
Humidity48%
Visibility—
Dew point46°
Mon, 2680° / 59°0
80 °
Spanish Flat, Monday, 26 October
Overcast. High 80°, low 59°.
Pressure29.77 inHg
Wind4.5 mph N
Humidity29%
Visibility—
Dew point37°
Tue, 2772° / 50°0
72 °
Spanish Flat, Tuesday, 27 October
Overcast. High 72°, low 50°.
Pressure29.80 inHg
Wind11.4 mph SW
Humidity51%
Visibility—
Dew point45°
Wed, 2861° / 49°0.08
61 °
Spanish Flat, Wednesday, 28 October
Light rain. High 61°, low 49°.
Pressure30.06 inHg
Wind14.6 mph S
Humidity69%
Visibility—
Dew point49°
Thu, 2962° / 44°0
62 °
Spanish Flat, Thursday, 29 October
Mostly clear. High 62°, low 44°.
Pressure30.09 inHg
Wind8.3 mph W
Humidity54%
Visibility—
Dew point39°
Fri, 3057° / 50°0.24
57 °
Spanish Flat, Friday, 30 October
Rain. High 57°, low 50°.
Pressure30.03 inHg
Wind8 mph S
Humidity76%
Visibility—
Dew point47°
Sat, 3160° / 46°0.21
60 °
Spanish Flat, Saturday, 31 October
Light rain. High 60°, low 46°.
Pressure29.88 inHg
Wind13.9 mph W
Humidity73%
Visibility—
Dew point51°
Sun, 0163° / 43°0
63 °
Spanish Flat, Sunday, 1 November
Clear. High 63°, low 43°.
Pressure30.18 inHg
Wind3.6 mph NW
Humidity46%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0271° / 50°0.06
71 °
Spanish Flat, Monday, 2 November
Climate normal for this date — 60-year average.
Average high71°
Average low50°
Average precipitation0.06 in
Chance of precipitation18%
Record high87° (2020)
Record low42° (1971)
Tue, 0371° / 50°0.04
71 °
Spanish Flat, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high71°
Average low50°
Average precipitation0.04 in
Chance of precipitation13%
Record high89° (2018)
Record low38° (2022)
Wed, 0471° / 51°0.04
71 °
Spanish Flat, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high71°
Average low51°
Average precipitation0.04 in
Chance of precipitation13%
Record high85° (1976)
Record low40° (1973)
Thu, 0569° / 50°0.11
69 °
Spanish Flat, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high69°
Average low50°
Average precipitation0.11 in
Chance of precipitation17%
Record high85° (2020)
Record low41° (2017)
Fri, 0668° / 51°0.08
68 °
Spanish Flat, Friday, 6 November
Climate normal for this date — 60-year average.
Average high68°
Average low51°
Average precipitation0.08 in
Chance of precipitation18%
Record high82° (1991)
Record low42° (1972)
Sat, 0768° / 50°0.12
68 °
Spanish Flat, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high68°
Average low50°
Average precipitation0.12 in
Chance of precipitation23%
Record high83° (1991)
Record low40° (2017)
Sun, 0866° / 49°0.09
66 °
Spanish Flat, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high66°
Average low49°
Average precipitation0.09 in
Chance of precipitation20%
Record high82° (2019)
Record low40° (2021)
Mon, 0966° / 48°0.12
66 °
Spanish Flat, Monday, 9 November
Climate normal for this date — 60-year average.
Average high66°
Average low48°
Average precipitation0.12 in
Chance of precipitation23%
Record high81° (1990)
Record low39° (2020)
Tue, 1065° / 48°0.19
65 °
Spanish Flat, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.19 in
Chance of precipitation30%
Record high83° (2019)
Record low37° (2022)
Wed, 1165° / 48°0.13
65 °
Spanish Flat, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.13 in
Chance of precipitation27%
Record high86° (2019)
Record low37° (2000)
Thu, 1266° / 48°0.09
66 °
Spanish Flat, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high66°
Average low48°
Average precipitation0.09 in
Chance of precipitation23%
Record high80° (1990)
Record low33° (1985)
Fri, 1365° / 48°0.19
65 °
Spanish Flat, Friday, 13 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.19 in
Chance of precipitation30%
Record high82° (1995)
Record low35° (1985)
Sat, 1465° / 48°0.07
65 °
Spanish Flat, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.07 in
Chance of precipitation22%
Record high82° (2008)
Record low35° (1978)
Sun, 1565° / 48°0.11
65 °
Spanish Flat, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.11 in
Chance of precipitation25%
Record high81° (2008)
Record low35° (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 Spanish Flat, 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 Spanish Flat, 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.