Monthly outlook for Harlingen, TX: average high 84.1°, average low 71.1°. That is 0.7° above the climate normal for October. Precipitation is expected on 5 days (about 0.7 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 31 October (89.5°), the coolest 17 October (57.8°).
84.1°/71.1°
Average high / low
+0.7°
Above normal
5 / 4
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
82.6°
83.4°
-0.4°
27 October – 5 November
86.4°
81°
+3°
6 November – 15 November
at normal
78.8°
—
October records over 66 years
99°18 October 2012All-time high
41.4°31 October 1993All-time low
Sun, 1877° / 59°0
77 °
Harlingen, Sunday, 18 October
Overcast. High 77°, low 59°.
Pressure30.30 inHg
Wind9.9 mph N
Humidity47%
Visibility6.2 mi
Dew point52°
Mon, 1981° / 65°0.08
81 °
Harlingen, Monday, 19 October
Light rain. High 81°, low 65°.
Pressure30.18 inHg
Wind7.9 mph NE
Humidity52%
Visibility6.2 mi
Dew point62°
Tue, 2085° / 70°0
85 °
Harlingen, Tuesday, 20 October
Partly cloudy. High 85°, low 70°.
Pressure30.12 inHg
Wind10.6 mph NE
Humidity48%
Visibility6.2 mi
Dew point63°
Wed, 2186° / 72°0.11
86 °
Harlingen, Wednesday, 21 October
Light rain. High 86°, low 72°.
Pressure30.12 inHg
Wind5.5 mph NE
Humidity66%
Visibility6.2 mi
Dew point71°
Thu, 2284° / 72°0.04
84 °
Harlingen, Thursday, 22 October
Light rain. High 84°, low 72°.
Pressure30.12 inHg
Wind10.3 mph E
Humidity63%
Visibility—
Dew point67°
Fri, 2384° / 69°0
84 °
Harlingen, Friday, 23 October
Clear. High 84°, low 69°.
Pressure30.06 inHg
Wind14.5 mph E
Humidity48%
Visibility—
Dew point60°
Sat, 2485° / 72°0.03
85 °
Harlingen, Saturday, 24 October
Light rain. High 85°, low 72°.
Pressure30.09 inHg
Wind15.9 mph E
Humidity50%
Visibility—
Dew point63°
Sun, 2586° / 74°0.02
86 °
Harlingen, Sunday, 25 October
Light rain. High 86°, low 74°.
Pressure30.06 inHg
Wind16.3 mph SE
Humidity48%
Visibility—
Dew point61°
Mon, 2687° / 76°0
87 °
Harlingen, Monday, 26 October
Overcast. High 87°, low 76°.
Pressure30.03 inHg
Wind16.5 mph SE
Humidity47%
Visibility—
Dew point63°
Tue, 2783° / 76°0.08
83 °
Harlingen, Tuesday, 27 October
Light rain. High 83°, low 76°.
Pressure30.00 inHg
Wind17.6 mph SE
Humidity69%
Visibility—
Dew point68°
Wed, 2882° / 75°0.34
82 °
Harlingen, Wednesday, 28 October
Light rain. High 82°, low 75°.
Pressure30.00 inHg
Wind13.8 mph SE
Humidity66%
Visibility—
Dew point68°
Thu, 2987° / 74°0.01
87 °
Harlingen, Thursday, 29 October
Light rain. High 87°, low 74°.
Pressure29.94 inHg
Wind12.9 mph SE
Humidity54%
Visibility—
Dew point66°
Fri, 3088° / 75°0
88 °
Harlingen, Friday, 30 October
Clear. High 88°, low 75°.
Pressure29.85 inHg
Wind17.2 mph SE
Humidity52%
Visibility—
Dew point66°
Sat, 3189° / 75°0
89 °
Harlingen, Saturday, 31 October
Clear. High 89°, low 75°.
Pressure29.91 inHg
Wind15.8 mph SE
Humidity50%
Visibility—
Dew point66°
Sun, 0189° / 76°0.01
89 °
Harlingen, Sunday, 1 November
Light rain. High 89°, low 76°.
Pressure30.00 inHg
Wind15.2 mph SE
Humidity51%
Visibility—
Dew point67°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0280° / 65°0.05
80 °
Harlingen, Monday, 2 November
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.05 in
Chance of precipitation23%
Record high91° (1961)
Record low47° (1966)
Tue, 0380° / 64°0.06
80 °
Harlingen, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.06 in
Chance of precipitation23%
Record high88° (1992)
Record low46° (1991)
Wed, 0480° / 64°0.06
80 °
Harlingen, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.06 in
Chance of precipitation17%
Record high97° (1988)
Record low45° (1991)
Thu, 0580° / 64°0.04
80 °
Harlingen, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.04 in
Chance of precipitation20%
Record high91° (1963)
Record low47° (1970)
Fri, 0681° / 65°0.06
81 °
Harlingen, Friday, 6 November
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.06 in
Chance of precipitation23%
Record high91° (1963)
Record low46° (1970)
Sat, 0781° / 66°0.06
81 °
Harlingen, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.06 in
Chance of precipitation22%
Record high90° (2025)
Record low48° (2002)
Sun, 0881° / 65°0.05
81 °
Harlingen, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.05 in
Chance of precipitation23%
Record high94° (2025)
Record low51° (2019)
Mon, 0979° / 66°0.04
79 °
Harlingen, Monday, 9 November
Climate normal for this date — 60-year average.
Average high79°
Average low66°
Average precipitation0.04 in
Chance of precipitation22%
Record high89° (1979)
Record low45° (1968)
Tue, 1079° / 65°0.04
79 °
Harlingen, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high79°
Average low65°
Average precipitation0.04 in
Chance of precipitation15%
Record high89° (2020)
Record low48° (1968)
Wed, 1179° / 65°0.06
79 °
Harlingen, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high79°
Average low65°
Average precipitation0.06 in
Chance of precipitation25%
Record high88° (2022)
Record low45° (2011)
Thu, 1278° / 63°0.06
78 °
Harlingen, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.06 in
Chance of precipitation30%
Record high90° (1988)
Record low37° (2019)
Fri, 1376° / 63°0.06
76 °
Harlingen, Friday, 13 November
Climate normal for this date — 60-year average.
Average high76°
Average low63°
Average precipitation0.06 in
Chance of precipitation27%
Record high94° (1969)
Record low39° (2019)
Sat, 1477° / 63°0.04
77 °
Harlingen, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high77°
Average low63°
Average precipitation0.04 in
Chance of precipitation13%
Record high89° (1989)
Record low38° (2018)
Sun, 1578° / 63°0.03
78 °
Harlingen, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.03 in
Chance of precipitation12%
Record high90° (1989)
Record low38° (2018)
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 Harlingen, TX 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 Harlingen, TX 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.