Monthly outlook for Hermiston, OR: average high 58.1°, average low 41.4°. That is 0.5° below the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 21 October (67.1°), the coolest 28 October (36°).
58.1°/41.4°
Average high / low
−0.5°
Below normal
0 / 4
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
59.4°
60.6°
-0.7°
31 October – 9 November
56.1°
55.7°
+0.2°
10 November – 19 November
at normal
51.9°
—
October records over 66 years
90.3°1 October 1997All-time high
20.7°31 October 2002All-time low
Climate normals and records are computed from the nearest reference point — Echo (8 mi).
Thu, 2263° / 41°0
63 °
Hermiston, Thursday, 22 October
Overcast. High 63°, low 41°.
Pressure29.85 inHg
Wind0.6 mph S
Humidity56%
Visibility3.5 mi
Dew point42°
Fri, 2363° / 46°0
63 °
Hermiston, Friday, 23 October
Clear. High 63°, low 46°.
Pressure30.15 inHg
Wind9.4 mph W
Humidity41%
Visibility6.2 mi
Dew point35°
Sat, 2463° / 38°0
63 °
Hermiston, Saturday, 24 October
Partly cloudy. High 63°, low 38°.
Pressure30.15 inHg
Wind0.8 mph NW
Humidity47%
Visibility6.2 mi
Dew point34°
Sun, 2564° / 44°0
64 °
Hermiston, Sunday, 25 October
Overcast. High 64°, low 44°.
Pressure30.12 inHg
Wind5.5 mph NE
Humidity47%
Visibility—
Dew point34°
Mon, 2664° / 42°0
64 °
Hermiston, Monday, 26 October
Overcast. High 64°, low 42°.
Pressure30.00 inHg
Wind5.5 mph SE
Humidity56%
Visibility—
Dew point39°
Tue, 2752° / 38°0
52 °
Hermiston, Tuesday, 27 October
Clear. High 52°, low 38°.
Pressure30.30 inHg
Wind8.9 mph NE
Humidity47%
Visibility—
Dew point27°
Wed, 2850° / 36°0
50 °
Hermiston, Wednesday, 28 October
Partly cloudy. High 50°, low 36°.
Pressure30.39 inHg
Wind5.8 mph NE
Humidity58%
Visibility—
Dew point29°
Thu, 2953° / 39°0
53 °
Hermiston, Thursday, 29 October
Overcast. High 53°, low 39°.
Pressure30.18 inHg
Wind4.4 mph NE
Humidity55%
Visibility—
Dew point31°
Fri, 3055° / 43°0
55 °
Hermiston, Friday, 30 October
Overcast. High 55°, low 43°.
Pressure29.88 inHg
Wind5.2 mph NW
Humidity52%
Visibility—
Dew point31°
Sat, 3155° / 46°0.01
55 °
Hermiston, Saturday, 31 October
Light rain. High 55°, low 46°.
Pressure29.83 inHg
Wind4.8 mph E
Humidity60%
Visibility—
Dew point35°
Sun, 0161° / 46°0
61 °
Hermiston, Sunday, 1 November
Clear. High 61°, low 46°.
Pressure29.83 inHg
Wind3.6 mph NE
Humidity66%
Visibility—
Dew point42°
Mon, 0261° / 48°0
61 °
Hermiston, Monday, 2 November
Overcast. High 61°, low 48°.
Pressure29.77 inHg
Wind12.4 mph SW
Humidity60%
Visibility—
Dew point42°
Tue, 0355° / 42°0
55 °
Hermiston, Tuesday, 3 November
Overcast. High 55°, low 42°.
Pressure30.24 inHg
Wind11.6 mph SW
Humidity50%
Visibility—
Dew point31°
Wed, 0453° / 39°0
53 °
Hermiston, Wednesday, 4 November
Clear. High 53°, low 39°.
Pressure30.30 inHg
Wind6.3 mph NE
Humidity40%
Visibility—
Dew point24°
Thu, 0553° / 38°0
53 °
Hermiston, Thursday, 5 November
Clear. High 53°, low 38°.
Pressure30.36 inHg
Wind7.4 mph NE
Humidity41%
Visibility—
Dew point24°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0656° / 40°0.06
56 °
Hermiston, Friday, 6 November
Climate normal for this date — 60-year average.
Average high56°
Average low40°
Average precipitation0.06 in
Chance of precipitation40%
Record high76° (2006)
Record low25° (2003)
Sat, 0755° / 40°0.08
55 °
Hermiston, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.08 in
Chance of precipitation37%
Record high75° (1978)
Record low24° (2003)
Sun, 0853° / 39°0.06
53 °
Hermiston, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.06 in
Chance of precipitation33%
Record high66° (1978)
Record low28° (2001)
Mon, 0954° / 38°0.04
54 °
Hermiston, Monday, 9 November
Climate normal for this date — 60-year average.
Average high54°
Average low38°
Average precipitation0.04 in
Chance of precipitation33%
Record high70° (1989)
Record low26° (2020)
Tue, 1053° / 39°0.04
53 °
Hermiston, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.04 in
Chance of precipitation20%
Record high70° (1989)
Record low21° (1986)
Wed, 1153° / 39°0.05
53 °
Hermiston, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.05 in
Chance of precipitation25%
Record high71° (1990)
Record low23° (1978)
Thu, 1253° / 39°0.06
53 °
Hermiston, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.06 in
Chance of precipitation32%
Record high77° (1999)
Record low11° (1985)
Fri, 1352° / 39°0.06
52 °
Hermiston, Friday, 13 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.06 in
Chance of precipitation37%
Record high72° (1999)
Record low15° (1985)
Sat, 1452° / 38°0.02
52 °
Hermiston, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.02 in
Chance of precipitation20%
Record high70° (2021)
Record low8° (2014)
Sun, 1553° / 38°0.04
53 °
Hermiston, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.04 in
Chance of precipitation25%
Record high73° (2021)
Record low4° (2014)
Mon, 1651° / 38°0.06
51 °
Hermiston, Monday, 16 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.06 in
Chance of precipitation33%
Record high68° (1976)
Record low5° (2014)
Tue, 1752° / 38°0.06
52 °
Hermiston, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.06 in
Chance of precipitation35%
Record high69° (1976)
Record low15° (2014)
Wed, 1850° / 37°0.06
50 °
Hermiston, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.06 in
Chance of precipitation33%
Record high64° (2003)
Record low12° (2014)
Thu, 1950° / 36°0.08
50 °
Hermiston, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.08 in
Chance of precipitation32%
Record high65° (1989)
Record low15° (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 Hermiston, OR 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 Hermiston, OR 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.