Harlingen weather in October: Harlingen, Texas: normal highs, lows, rain and records for October
Harlingen in October has a normal high of 88°F and a normal low of 66°F, a daily mean of 77°F, falling from 90°F on the 1st to 84°F by the 31st. Measurable precipitation falls on 9 days in a normal October, 2.71 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 19°C, 69 mm of precipitation in October.
- NOAA stationHarlingen Rio Grande Airport
- Station IDUSW00012904
- Location26.23°N 97.65°W
- Elevation34 ft (10 m)
- Population72,234
- Jan 72° 50°
- Feb 76° 54°
- Mar 81° 59°
- Apr 87° 65°
- May 91° 71°
- Jun 95° 75°
- Jul 96° 75°
- Aug 97° 75°
- Sep 92° 73°
- Oct 88° 66°
- Nov 79° 57°
- Dec 73° 52°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Harlingen in October?
The normal high is 88°F and the normal low 66°F, for a daily mean of 76.6°F. October is 5.7°F cooler than September and 8.2°F warmer than November. October is the 6th warmest month of the year in Harlingen and the 2nd wettest. Across the month the normal high falls 6°F, from 90°F on October 1 to 84°F on October 31. From one year to the next October's mean temperature typically moves about 1.4°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 75°F and 78°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 90°F | 70°F | 32% | 18% |
| October 8 | 89°F | 68°F | 31% | 15% |
| October 15 | 88°F | 66°F | 29% | 13% |
| October 22 | 87°F | 64°F | 28% | 12% |
| October 31 | 84°F | 61°F | 27% | 10% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 90°F | 70°F | 32% | 18% | 12 h |
| October 2 | 90°F | 70°F | 32% | 17% | 11 h 50 min |
| October 3 | 90°F | 69°F | 32% | 17% | 11 h 50 min |
| October 4 | 90°F | 69°F | 32% | 17% | 11 h 50 min |
| October 5 | 90°F | 69°F | 31% | 16% | 11 h 50 min |
| October 6 | 90°F | 69°F | 31% | 16% | 11 h 50 min |
| October 7 | 90°F | 68°F | 31% | 16% | 11 h 50 min |
| October 8 | 89°F | 68°F | 31% | 15% | 11 h 50 min |
| October 9 | 89°F | 68°F | 30% | 15% | 11 h 40 min |
| October 10 | 89°F | 67°F | 30% | 15% | 11 h 40 min |
| October 11 | 89°F | 67°F | 30% | 15% | 11 h 40 min |
| October 12 | 89°F | 67°F | 30% | 14% | 11 h 40 min |
| October 13 | 89°F | 67°F | 29% | 14% | 11 h 40 min |
| October 14 | 88°F | 66°F | 29% | 14% | 11 h 40 min |
| October 15 | 88°F | 66°F | 29% | 13% | 11 h 30 min |
| October 16 | 88°F | 66°F | 29% | 13% | 11 h 30 min |
| October 17 | 88°F | 65°F | 29% | 13% | 11 h 30 min |
| October 18 | 88°F | 65°F | 29% | 13% | 11 h 30 min |
| October 19 | 87°F | 65°F | 28% | 13% | 11 h 30 min |
| October 20 | 87°F | 65°F | 28% | 12% | 11 h 30 min |
| October 21 | 87°F | 64°F | 28% | 12% | 11 h 30 min |
| October 22 | 87°F | 64°F | 28% | 12% | 11 h 20 min |
| October 23 | 86°F | 64°F | 28% | 12% | 11 h 20 min |
| October 24 | 86°F | 63°F | 28% | 12% | 11 h 20 min |
| October 25 | 86°F | 63°F | 28% | 11% | 11 h 20 min |
| October 26 | 85°F | 63°F | 28% | 11% | 11 h 20 min |
| October 27 | 85°F | 62°F | 27% | 11% | 11 h 20 min |
| October 28 | 85°F | 62°F | 27% | 11% | 11 h 20 min |
| October 29 | 85°F | 62°F | 27% | 11% | 11 h 10 min |
| October 30 | 84°F | 62°F | 27% | 11% | 11 h 10 min |
| October 31 | 84°F | 61°F | 27% | 10% | 11 h 10 min |
- Normal high
- 88°FOctober average
- Normal low
- 66°FOctober average
- Precipitation
- 2.71 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 14
- Daylight
- 12 h to 11 h 10 minOctober 1 to October 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 28
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00012904; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Harlingen in October?
On a given October day the chance of 0.01 inch or more is 29% on average, highest around October 1 (32%). In all, 2.71 in falls on 9 days of a normal October, 1 of them with an inch or more.
In a normal October in Harlingen, 14 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00012904.
What are the records for October in Harlingen?
The warmest October temperature on this station's record (since 1952) is 101°F, on October 18, 2012; the coldest is 39°F, on October 29, 2017. The wettest October brought 10.50 in (1958).
The October mean against the 1991-2020 normal of 76.6°F: 2021 78.6°F (+2.0), 2022 75.9°F (−0.7), 2023 76.5°F (−0.1), 2024 77.6°F (+1.0), 2025 79.1°F (+2.5). 3 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 78.6°F | +2.0°F | 8.72 in |
| 2022 | 75.9°F | −0.7°F | 0.22 in |
| 2023 | 76.5°F | −0.1°F | 2.51 in |
| 2024 | 77.6°F | +1.0°F | 3.16 in |
| 2025 | 79.1°F | +2.5°F | 0.69 in |
Source: records: ACIS, station USW00012904; recent months: ACIS, station USW00012904. Records and recent months use complete months only.
How does October in Harlingen compare across Texas?
Across the 321 places PlainClimate covers in Texas, October normal highs run from 71°F in Channing to 89°F in McAllen; Harlingen's is 88°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.