Monthly outlook for Oleum, CA: average high 75.6°, average low 56.8°. That is 1° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.7 inches. The warmest day looks like 16 October (83.7°), the coolest 14 October (49°).
75.6°/56.8°
Average high / low
+1°
Above normal
0 / 2
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
74.6°
75.1°
-0.2°
23 October – 1 November
77.3°
70.8°
+3.6°
2 November – 11 November
at normal
66.8°
—
October records over 66 years
99°3 October 1980All-time high
39.4°29 October 1972All-time low
Climate normals and records are computed from the nearest reference point — Vallejo (5 mi).
Wed, 1479° / 49°0
79 °
Oleum, Wednesday, 14 October
Clear. High 79°, low 49°.
Pressure30.15 inHg
Wind2.7 mph W
Humidity67%
Visibility5.6 mi
Dew point54°
Thu, 1579° / 56°0
79 °
Oleum, Thursday, 15 October
Clear. High 79°, low 56°.
Pressure30.12 inHg
Wind2.1 mph W
Humidity47%
Visibility6.2 mi
Dew point48°
Fri, 1684° / 61°0
84 °
Oleum, Friday, 16 October
Clear. High 84°, low 61°.
Pressure30.06 inHg
Wind1.7 mph W
Humidity25%
Visibility6.2 mi
Dew point40°
Sat, 1778° / 60°0
78 °
Oleum, Saturday, 17 October
Clear. High 78°, low 60°.
Pressure30.03 inHg
Wind6.3 mph S
Humidity49%
Visibility—
Dew point48°
Sun, 1868° / 57°0
68 °
Oleum, Sunday, 18 October
Clear. High 68°, low 57°.
Pressure30.03 inHg
Wind13 mph W
Humidity70%
Visibility—
Dew point53°
Mon, 1967° / 56°0
67 °
Oleum, Monday, 19 October
Overcast. High 67°, low 56°.
Pressure30.00 inHg
Wind14.9 mph W
Humidity68%
Visibility—
Dew point50°
Tue, 2067° / 50°0
67 °
Oleum, Tuesday, 20 October
Clear. High 67°, low 50°.
Pressure30.03 inHg
Wind9.1 mph SW
Humidity51%
Visibility—
Dew point38°
Wed, 2174° / 54°0
74 °
Oleum, Wednesday, 21 October
Clear. High 74°, low 54°.
Pressure30.03 inHg
Wind7.4 mph SW
Humidity35%
Visibility—
Dew point35°
Thu, 2274° / 58°0
74 °
Oleum, Thursday, 22 October
Clear. High 74°, low 58°.
Pressure30.15 inHg
Wind8.7 mph SW
Humidity21%
Visibility—
Dew point24°
Fri, 2381° / 59°0
81 °
Oleum, Friday, 23 October
Clear. High 81°, low 59°.
Pressure30.18 inHg
Wind13.8 mph NE
Humidity19%
Visibility—
Dew point24°
Sat, 2482° / 61°0
82 °
Oleum, Saturday, 24 October
Clear. High 82°, low 61°.
Pressure30.24 inHg
Wind13.2 mph NE
Humidity13%
Visibility—
Dew point17°
Sun, 2579° / 62°0
79 °
Oleum, Sunday, 25 October
Clear. High 79°, low 62°.
Pressure30.09 inHg
Wind7.9 mph SW
Humidity12%
Visibility—
Dew point15°
Mon, 2677° / 60°0
77 °
Oleum, Monday, 26 October
Mostly clear. High 77°, low 60°.
Pressure29.94 inHg
Wind5.7 mph SW
Humidity22%
Visibility—
Dew point27°
Tue, 2771° / 59°0
71 °
Oleum, Tuesday, 27 October
Mostly clear. High 71°, low 59°.
Pressure30.00 inHg
Wind7.9 mph SW
Humidity45%
Visibility—
Dew point44°
Wed, 2874° / 58°0
74 °
Oleum, Wednesday, 28 October
Partly cloudy. High 74°, low 58°.
Pressure30.03 inHg
Wind4 mph SW
Humidity49%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2969° / 50°0.06
69 °
Oleum, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high69°
Average low50°
Average precipitation0.06 in
Chance of precipitation22%
Record high82° (1965)
Record low39° (1972)
Fri, 3069° / 50°0.06
69 °
Oleum, Friday, 30 October
Climate normal for this date — 60-year average.
Average high69°
Average low50°
Average precipitation0.06 in
Chance of precipitation17%
Record high83° (2015)
Record low41° (1971)
Sat, 3170° / 50°0.02
70 °
Oleum, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high70°
Average low50°
Average precipitation0.02 in
Chance of precipitation12%
Record high83° (1966)
Record low44° (2019)
Sun, 0170° / 50°0.05
70 °
Oleum, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high70°
Average low50°
Average precipitation0.05 in
Chance of precipitation15%
Record high86° (1967)
Record low41° (2003)
Mon, 0270° / 50°0.03
70 °
Oleum, Monday, 2 November
Climate normal for this date — 60-year average.
Average high70°
Average low50°
Average precipitation0.03 in
Chance of precipitation12%
Record high87° (1967)
Record low41° (1994)
Tue, 0369° / 50°0.03
69 °
Oleum, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high69°
Average low50°
Average precipitation0.03 in
Chance of precipitation12%
Record high83° (2018)
Record low40° (1994)
Wed, 0469° / 50°0.02
69 °
Oleum, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high69°
Average low50°
Average precipitation0.02 in
Chance of precipitation10%
Record high80° (1980)
Record low40° (1973)
Thu, 0568° / 50°0.06
68 °
Oleum, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high68°
Average low50°
Average precipitation0.06 in
Chance of precipitation15%
Record high81° (1976)
Record low41° (2011)
Fri, 0667° / 51°0.06
67 °
Oleum, Friday, 6 November
Climate normal for this date — 60-year average.
Average high67°
Average low51°
Average precipitation0.06 in
Chance of precipitation20%
Record high80° (1991)
Record low42° (1972)
Sat, 0767° / 50°0.07
67 °
Oleum, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high67°
Average low50°
Average precipitation0.07 in
Chance of precipitation23%
Record high80° (1991)
Record low39° (1971)
Sun, 0865° / 49°0.07
65 °
Oleum, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high65°
Average low49°
Average precipitation0.07 in
Chance of precipitation22%
Record high79° (1978)
Record low42° (1982)
Mon, 0965° / 48°0.09
65 °
Oleum, Monday, 9 November
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.09 in
Chance of precipitation20%
Record high80° (1990)
Record low40° (1985)
Tue, 1064° / 48°0.13
64 °
Oleum, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high64°
Average low48°
Average precipitation0.13 in
Chance of precipitation27%
Record high79° (1990)
Record low40° (2011)
Wed, 1164° / 48°0.09
64 °
Oleum, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high64°
Average low48°
Average precipitation0.09 in
Chance of precipitation28%
Record high77° (1990)
Record low37° (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 Oleum, 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 Oleum, 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.