Monthly outlook for Harlingen, TX: average high 81.6°, average low 69.4°. That is 0° below the climate normal for October. Precipitation is expected on 5 days (about 2.7 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 2 November (88.9°), the coolest 4 November (57.6°).
81.6°/69.4°
Average high / low
−0°
Below normal
5 / 4
Wet days / normal
2.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
22 October – 31 October
84.3°
82.4°
+1.1°
1 November – 10 November
77°
80.1°
-1.7°
11 November – 20 November
at normal
77.5°
—
October records over 66 years
99°18 October 2012All-time high
41.4°31 October 1993All-time low
Fri, 2385° / 71°0
85 °
Harlingen, Friday, 23 October
Mostly clear. High 85°, low 71°.
Pressure30.09 inHg
Wind6.7 mph E
Humidity49%
Visibility6.2 mi
Dew point63°
Sat, 2487° / 69°0.02
87 °
Harlingen, Saturday, 24 October
Light rain. High 87°, low 69°.
Pressure30.09 inHg
Wind11.1 mph SE
Humidity50%
Visibility6.2 mi
Dew point65°
Sun, 2586° / 71°0
86 °
Harlingen, Sunday, 25 October
Overcast. High 86°, low 71°.
Pressure30.18 inHg
Wind10.2 mph SE
Humidity43%
Visibility6.2 mi
Dew point60°
Mon, 2686° / 68°0
86 °
Harlingen, Monday, 26 October
Overcast. High 86°, low 68°.
Pressure30.12 inHg
Wind4.2 mph E
Humidity43%
Visibility6.2 mi
Dew point59°
Tue, 2782° / 70°0.75
82 °
Harlingen, Tuesday, 27 October
Rain. High 82°, low 70°.
Pressure30.09 inHg
Wind6.6 mph E
Humidity65%
Visibility—
Dew point68°
Wed, 2884° / 71°0.44
84 °
Harlingen, Wednesday, 28 October
Rain. High 84°, low 71°.
Pressure30.03 inHg
Wind11.3 mph E
Humidity59%
Visibility—
Dew point67°
Thu, 2982° / 74°0.04
82 °
Harlingen, Thursday, 29 October
Light rain. High 82°, low 74°.
Pressure30.00 inHg
Wind15.2 mph SE
Humidity66%
Visibility—
Dew point68°
Fri, 3083° / 76°0.01
83 °
Harlingen, Friday, 30 October
Light rain. High 83°, low 76°.
Pressure29.91 inHg
Wind17.4 mph SE
Humidity63%
Visibility—
Dew point69°
Sat, 3187° / 73°0
87 °
Harlingen, Saturday, 31 October
Mostly clear. High 87°, low 73°.
Pressure29.85 inHg
Wind14.4 mph S
Humidity51%
Visibility—
Dew point65°
Sun, 0189° / 76°0
89 °
Harlingen, Sunday, 1 November
Partly cloudy. High 89°, low 76°.
Pressure29.85 inHg
Wind18.9 mph S
Humidity52%
Visibility—
Dew point67°
Mon, 0289° / 77°0
89 °
Harlingen, Monday, 2 November
Mostly clear. High 89°, low 77°.
Pressure29.80 inHg
Wind19.6 mph S
Humidity53%
Visibility—
Dew point68°
Tue, 0379° / 65°1.1
79 °
Harlingen, Tuesday, 3 November
Rain. High 79°, low 65°.
Pressure29.91 inHg
Wind19.8 mph NW
Humidity91%
Visibility—
Dew point70°
Wed, 0461° / 58°0.26
61 °
Harlingen, Wednesday, 4 November
Light rain. High 61°, low 58°.
Pressure30.21 inHg
Wind18.2 mph NW
Humidity79%
Visibility—
Dew point51°
Thu, 0570° / 59°0.03
70 °
Harlingen, Thursday, 5 November
Light rain. High 70°, low 59°.
Pressure30.30 inHg
Wind14.6 mph NW
Humidity49%
Visibility—
Dew point44°
Fri, 0675° / 59°0
75 °
Harlingen, Friday, 6 November
Clear. High 75°, low 59°.
Pressure30.18 inHg
Wind10.2 mph E
Humidity45%
Visibility—
Dew point48°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Mon, 1677° / 63°0.06
77 °
Harlingen, Monday, 16 November
Climate normal for this date — 60-year average.
Average high77°
Average low63°
Average precipitation0.06 in
Chance of precipitation25%
Record high90° (2011)
Record low39° (1970)
Tue, 1778° / 63°0.05
78 °
Harlingen, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.05 in
Chance of precipitation28%
Record high90° (2024)
Record low42° (2014)
Wed, 1878° / 64°0.04
78 °
Harlingen, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high78°
Average low64°
Average precipitation0.04 in
Chance of precipitation17%
Record high92° (2024)
Record low44° (2014)
Thu, 1978° / 64°0.06
78 °
Harlingen, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high78°
Average low64°
Average precipitation0.06 in
Chance of precipitation20%
Record high92° (1983)
Record low46° (1980)
Fri, 2076° / 62°0.06
76 °
Harlingen, Friday, 20 November
Climate normal for this date — 60-year average.
Average high76°
Average low62°
Average precipitation0.06 in
Chance of precipitation22%
Record high89° (1994)
Record low43° (1969)
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.