Monthly outlook for Crestline, CA: average high 66.4°, average low 48°. That is 6.4° below the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 16 October (79.9°), the coolest 13 October (41.2°).
66.4°/48°
Average high / low
−6.4°
Below normal
1 / 1
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
68.1°
78.9°
-6°
23 October – 1 November
63.6°
75.3°
-6.5°
2 November – 11 November
at normal
72.3°
—
October records over 66 years
105.6°2 October 2024All-time high
30.6°30 October 1971All-time low
Climate normals and records are computed from the nearest reference point — San Bernardino (7 mi).
Wed, 1465° / 43°0
65 °
Crestline, Wednesday, 14 October
Clear. High 65°, low 43°.
Pressure30.12 inHg
Wind12.1 mph N
Humidity30%
Visibility6.2 mi
Dew point33°
Thu, 1575° / 49°0
75 °
Crestline, Thursday, 15 October
Clear. High 75°, low 49°.
Pressure30.12 inHg
Wind16.6 mph N
Humidity29%
Visibility6.2 mi
Dew point37°
Fri, 1680° / 59°0
80 °
Crestline, Friday, 16 October
Clear. High 80°, low 59°.
Pressure30.09 inHg
Wind16.4 mph N
Humidity34%
Visibility6.2 mi
Dew point42°
Sat, 1777° / 59°0
77 °
Crestline, Saturday, 17 October
Partly cloudy. High 77°, low 59°.
Pressure30.03 inHg
Wind12.8 mph N
Humidity26%
Visibility6.2 mi
Dew point37°
Sun, 1880° / 58°0
80 °
Crestline, Sunday, 18 October
Clear. High 80°, low 58°.
Pressure30.03 inHg
Wind8 mph N
Humidity31%
Visibility—
Dew point40°
Mon, 1974° / 56°0
74 °
Crestline, Monday, 19 October
Clear. High 74°, low 56°.
Pressure29.97 inHg
Wind13.7 mph S
Humidity31%
Visibility—
Dew point39°
Tue, 2053° / 47°0.08
53 °
Crestline, Tuesday, 20 October
Light rain. High 53°, low 47°.
Pressure29.91 inHg
Wind18.1 mph S
Humidity70%
Visibility—
Dew point42°
Wed, 2158° / 43°0
58 °
Crestline, Wednesday, 21 October
Light rain. High 58°, low 43°.
Pressure29.91 inHg
Wind5 mph SW
Humidity55%
Visibility—
Dew point35°
Thu, 2262° / 43°0
62 °
Crestline, Thursday, 22 October
Clear. High 62°, low 43°.
Pressure29.97 inHg
Wind9.9 mph S
Humidity21%
Visibility—
Dew point18°
Fri, 2362° / 44°0
62 °
Crestline, Friday, 23 October
Clear. High 62°, low 44°.
Pressure29.91 inHg
Wind7.8 mph S
Humidity42%
Visibility—
Dew point33°
Sat, 2463° / 45°0
63 °
Crestline, Saturday, 24 October
Clear. High 63°, low 45°.
Pressure30.00 inHg
Wind9.7 mph N
Humidity54%
Visibility—
Dew point38°
Sun, 2565° / 45°0
65 °
Crestline, Sunday, 25 October
Clear. High 65°, low 45°.
Pressure30.12 inHg
Wind9.8 mph N
Humidity15%
Visibility—
Dew point10°
Mon, 2668° / 47°0
68 °
Crestline, Monday, 26 October
Clear. High 68°, low 47°.
Pressure29.91 inHg
Wind8.8 mph NE
Humidity14%
Visibility—
Dew point11°
Tue, 2759° / 45°0
59 °
Crestline, Tuesday, 27 October
Overcast. High 59°, low 45°.
Pressure30.06 inHg
Wind17.7 mph N
Humidity13%
Visibility—
Dew point5°
Wed, 2866° / 45°0
66 °
Crestline, Wednesday, 28 October
Overcast. High 66°, low 45°.
Pressure30.18 inHg
Wind10.5 mph N
Humidity13%
Visibility—
Dew point8°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2973° / 51°0.01
73 °
Crestline, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high73°
Average low51°
Average precipitation0.01 in
Chance of precipitation8%
Record high91° (2025)
Record low33° (1971)
Fri, 3073° / 50°0.03
73 °
Crestline, Friday, 30 October
Climate normal for this date — 60-year average.
Average high73°
Average low50°
Average precipitation0.03 in
Chance of precipitation12%
Record high91° (2025)
Record low31° (1971)
Sat, 3174° / 50°0.02
74 °
Crestline, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high74°
Average low50°
Average precipitation0.02 in
Chance of precipitation5%
Record high89° (1988)
Record low35° (1972)
Sun, 0174° / 49°0.02
74 °
Crestline, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high74°
Average low49°
Average precipitation0.02 in
Chance of precipitation10%
Record high89° (2020)
Record low35° (1971)
Mon, 0274° / 49°0.02
74 °
Crestline, Monday, 2 November
Climate normal for this date — 60-year average.
Average high74°
Average low49°
Average precipitation0.02 in
Chance of precipitation8%
Record high89° (2009)
Record low37° (1971)
Tue, 0375° / 48°0.01
75 °
Crestline, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high75°
Average low48°
Average precipitation0.01 in
Chance of precipitation8%
Record high92° (2010)
Record low37° (1990)
Wed, 0475° / 49°0.02
75 °
Crestline, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high75°
Average low49°
Average precipitation0.02 in
Chance of precipitation7%
Record high92° (2020)
Record low34° (1994)
Thu, 0574° / 50°0.01
74 °
Crestline, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high74°
Average low50°
Average precipitation0.01 in
Chance of precipitation5%
Record high91° (2020)
Record low37° (2015)
Fri, 0672° / 49°0.01
72 °
Crestline, Friday, 6 November
Climate normal for this date — 60-year average.
Average high72°
Average low49°
Average precipitation0.01 in
Chance of precipitation5%
Record high88° (1991)
Record low40° (2015)
Sat, 0771° / 49°0.05
71 °
Crestline, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high71°
Average low49°
Average precipitation0.05 in
Chance of precipitation7%
Record high90° (2006)
Record low35° (2011)
Sun, 0871° / 49°0.06
71 °
Crestline, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high71°
Average low49°
Average precipitation0.06 in
Chance of precipitation17%
Record high89° (2016)
Record low35° (2011)
Mon, 0970° / 48°0.04
70 °
Crestline, Monday, 9 November
Climate normal for this date — 60-year average.
Average high70°
Average low48°
Average precipitation0.04 in
Chance of precipitation12%
Record high89° (2025)
Record low35° (2020)
Tue, 1070° / 48°0.02
70 °
Crestline, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high70°
Average low48°
Average precipitation0.02 in
Chance of precipitation15%
Record high91° (2025)
Record low37° (2020)
Wed, 1170° / 47°0.05
70 °
Crestline, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high70°
Average low47°
Average precipitation0.05 in
Chance of precipitation10%
Record high87° (2021)
Record low35° (2012)
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 Crestline, 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 Crestline, 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.