Monthly outlook for Newcastle, CA: average high 75.6°, average low 53°. That is 0° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 2 days and 1.0 inches. The warmest day looks like 15 October (89.6°), the coolest 21 October (45°).
75.6°/53°
Average high / low
+0°
Above normal
1 / 2
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
75°
76.9°
-1.1°
22 October – 31 October
76.5°
71.8°
+2.7°
1 November – 10 November
at normal
67.3°
—
October records over 66 years
102.6°2 October 2024All-time high
37.6°31 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Roseville (12 mi).
Tue, 1376° / 47°0
76 °
Newcastle, Tuesday, 13 October
Clear. High 76°, low 47°.
Pressure30.03 inHg
Wind11.9 mph NW
Humidity23%
Visibility6.2 mi
Dew point25°
Wed, 1478° / 48°0
78 °
Newcastle, Wednesday, 14 October
Clear. High 78°, low 48°.
Pressure30.12 inHg
Wind4.9 mph SW
Humidity22%
Visibility6.2 mi
Dew point31°
Thu, 1590° / 52°0
90 °
Newcastle, Thursday, 15 October
Clear. High 90°, low 52°.
Pressure30.09 inHg
Wind5.2 mph W
Humidity18%
Visibility6.2 mi
Dew point33°
Fri, 1686° / 63°0
86 °
Newcastle, Friday, 16 October
Clear. High 86°, low 63°.
Pressure30.03 inHg
Wind5.6 mph W
Humidity17%
Visibility6.2 mi
Dew point35°
Sat, 1787° / 62°0
87 °
Newcastle, Saturday, 17 October
Clear. High 87°, low 62°.
Pressure30.00 inHg
Wind8.3 mph E
Humidity15%
Visibility—
Dew point27°
Sun, 1879° / 61°0
79 °
Newcastle, Sunday, 18 October
Clear. High 79°, low 61°.
Pressure29.94 inHg
Wind8 mph SE
Humidity33%
Visibility—
Dew point41°
Mon, 1961° / 50°0.15
61 °
Newcastle, Monday, 19 October
Light rain. High 61°, low 50°.
Pressure30.00 inHg
Wind10 mph SE
Humidity89%
Visibility—
Dew point51°
Tue, 2059° / 46°0.02
59 °
Newcastle, Tuesday, 20 October
Light rain. High 59°, low 46°.
Pressure29.91 inHg
Wind7.1 mph NW
Humidity62%
Visibility—
Dew point41°
Wed, 2167° / 45°0
67 °
Newcastle, Wednesday, 21 October
Clear. High 67°, low 45°.
Pressure30.03 inHg
Wind8.7 mph W
Humidity34%
Visibility—
Dew point29°
Thu, 2268° / 49°0
68 °
Newcastle, Thursday, 22 October
Clear. High 68°, low 49°.
Pressure30.21 inHg
Wind5.1 mph W
Humidity26%
Visibility—
Dew point26°
Fri, 2373° / 50°0
73 °
Newcastle, Friday, 23 October
Clear. High 73°, low 50°.
Pressure30.18 inHg
Wind7.7 mph NW
Humidity32%
Visibility—
Dew point32°
Sat, 2475° / 54°0
75 °
Newcastle, Saturday, 24 October
Clear. High 75°, low 54°.
Pressure30.21 inHg
Wind6.4 mph W
Humidity23%
Visibility—
Dew point29°
Sun, 2579° / 57°0
79 °
Newcastle, Sunday, 25 October
Overcast. High 79°, low 57°.
Pressure30.12 inHg
Wind6 mph E
Humidity17%
Visibility—
Dew point24°
Mon, 2682° / 58°0
82 °
Newcastle, Monday, 26 October
Clear. High 82°, low 58°.
Pressure30.15 inHg
Wind5.1 mph NE
Humidity15%
Visibility—
Dew point22°
Tue, 2782° / 60°0
82 °
Newcastle, Tuesday, 27 October
Clear. High 82°, low 60°.
Pressure30.12 inHg
Wind5.1 mph E
Humidity16%
Visibility—
Dew point24°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2870° / 49°0.11
70 °
Newcastle, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high70°
Average low49°
Average precipitation0.11 in
Chance of precipitation17%
Record high84° (2003)
Record low39° (2023)
Thu, 2970° / 49°0.07
70 °
Newcastle, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high70°
Average low49°
Average precipitation0.07 in
Chance of precipitation22%
Record high81° (1965)
Record low38° (1971)
Fri, 3069° / 48°0.11
69 °
Newcastle, Friday, 30 October
Climate normal for this date — 60-year average.
Average high69°
Average low48°
Average precipitation0.11 in
Chance of precipitation25%
Record high82° (2015)
Record low38° (2023)
Sat, 3170° / 47°0.04
70 °
Newcastle, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high70°
Average low47°
Average precipitation0.04 in
Chance of precipitation18%
Record high83° (2015)
Record low38° (2019)
Sun, 0170° / 47°0.06
70 °
Newcastle, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high70°
Average low47°
Average precipitation0.06 in
Chance of precipitation18%
Record high83° (2018)
Record low37° (1971)
Mon, 0269° / 47°0.09
69 °
Newcastle, Monday, 2 November
Climate normal for this date — 60-year average.
Average high69°
Average low47°
Average precipitation0.09 in
Chance of precipitation18%
Record high84° (1966)
Record low38° (2019)
Tue, 0369° / 47°0.08
69 °
Newcastle, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high69°
Average low47°
Average precipitation0.08 in
Chance of precipitation18%
Record high85° (2018)
Record low38° (2022)
Wed, 0469° / 47°0.06
69 °
Newcastle, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high69°
Average low47°
Average precipitation0.06 in
Chance of precipitation15%
Record high83° (1976)
Record low36° (1973)
Thu, 0568° / 47°0.09
68 °
Newcastle, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high68°
Average low47°
Average precipitation0.09 in
Chance of precipitation13%
Record high83° (1976)
Record low37° (2011)
Fri, 0667° / 48°0.1
67 °
Newcastle, Friday, 6 November
Climate normal for this date — 60-year average.
Average high67°
Average low48°
Average precipitation0.1 in
Chance of precipitation20%
Record high81° (1976)
Record low38° (1996)
Sat, 0767° / 47°0.09
67 °
Newcastle, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high67°
Average low47°
Average precipitation0.09 in
Chance of precipitation30%
Record high79° (1976)
Record low38° (2011)
Sun, 0865° / 47°0.11
65 °
Newcastle, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high65°
Average low47°
Average precipitation0.11 in
Chance of precipitation32%
Record high77° (1976)
Record low37° (2011)
Mon, 0964° / 45°0.11
64 °
Newcastle, Monday, 9 November
Climate normal for this date — 60-year average.
Average high64°
Average low45°
Average precipitation0.11 in
Chance of precipitation28%
Record high78° (1976)
Record low34° (2020)
Tue, 1064° / 45°0.13
64 °
Newcastle, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high64°
Average low45°
Average precipitation0.13 in
Chance of precipitation35%
Record high78° (1990)
Record low33° (2020)
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 Newcastle, 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 Newcastle, 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.