Climate Comfort Score
95/100
Excellent
NOAA 1991–2020 normals 75°F annual avg Public-domain federal data
Harlingen Rio Grande, TX Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 75°F
- Avg annual temp
- 95/100
- Comfort score
- 24.0"
- Annual precip
- 355d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Harlingen Rio Grande
Harlingen Rio Grande, Texas averages 75°F a year and scores 95/100 on the comfort index - excellent, milder than 98% of U.S. cities.
- 75°F
- average temperature, NOAA 1991-2020 normal
- 95/100
- comfort score, milder than 98% of U.S. cities
- 24.0"
- precipitation, annual total
- 355 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
75°F (24°C)
Avg High
86°F
Avg Low
64°F
Annual Precip
24.0"
Comfort Score
95/100
Excellent
Avg Annual Temperature
75°F
30-year mean (NOAA NCEI)
Annual Precipitation
24.0"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Harlingen Rio Grande) 95.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the Harlingen Rio Grande area.
How Harlingen Rio Grande compares to every U.S. city
Harlingen Rio Grande's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
95 Top 2% higher than 98% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Harlingen Rio Grande
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. Harlingen Rio Grande's current NOAA 1991-2020 normal sits within that longer spread, and the most recent decade runs warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 72°F (22°C) | 50°F (10°C) | 61°F (16°C) | 1.1" | 0.6 | 0.2 |
| February | 76°F (24°C) | 54°F (12°C) | 65°F (18°C) | 0.7" | 0.3 | 0.7 |
| March | 81°F (27°C) | 59°F (15°C) | 70°F (21°C) | 1.3" | 0.0 | 3.2 |
| April | 87°F (30°C) | 65°F (18°C) | 76°F (24°C) | 1.5" | 0.0 | 11.0 |
| May | 91°F (33°C) | 71°F (22°C) | 81°F (27°C) | 2.5" | 0.0 | 22.0 |
| June | 95°F (35°C) | 75°F (24°C) | 85°F (29°C) | 2.3" | 0.0 | 28.1 |
| July | 96°F (36°C) | 75°F (24°C) | 86°F (30°C) | 1.8" | 0.0 | 29.5 |
| August | 97°F (36°C) | 75°F (24°C) | 86°F (30°C) | 1.9" | 0.0 | 30.2 |
| September | 92°F (33°C) | 73°F (23°C) | 82°F (28°C) | 5.3" | 0.0 | 22.1 |
| October | 88°F (31°C) | 66°F (19°C) | 77°F (25°C) | 2.7" | 0.0 | 14.1 |
| November | 79°F (26°C) | 57°F (14°C) | 68°F (20°C) | 1.8" | 0.0 | 1.9 |
| December | 73°F (23°C) | 52°F (11°C) | 62°F (17°C) | 1.2" | 0.5 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.1"
8.3 days with precipitation
February 0.7"
5.8 days with precipitation
March 1.3"
5.9 days with precipitation
April 1.5"
4.7 days with precipitation
May 2.5"
5.5 days with precipitation
June 2.3"
6.2 days with precipitation
July 1.8"
5.8 days with precipitation
August 1.9"
5.4 days with precipitation
September 5.3"
11.1 days with precipitation
October 2.7"
8.9 days with precipitation
November 1.8"
8.2 days with precipitation
December 1.2"
7.7 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
December 29
50% probability date
Last Spring Freeze
January 8
50% probability date
Growing Season
355 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
569
Higher = more heating needed
Cooling Degree Days
4,220
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
What Harlingen Rio Grande's climate means for you
Harlingen Rio Grande runs 75°F a year - peaking in August, coldest in January.
- Gardeners get about 355 frost-free days, with the last spring freeze near January 8 - plan the planting calendar around it, not the regional average.
- Energy bills track 569 heating and 4,220 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Harlingen Rio Grande, TX
Based on station USW00012904 feeding NOAA's 1991–2020 climate normals, Harlingen Rio Grande, Texas averages 75°F a year, ranging from a mean daily high of 86°F to a mean daily low of 64°F. August is typically the warmest month of the year, while January is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Beyond temperature, Harlingen Rio Grande averages 24.0 inches of precipitation annually, predominantly as rainfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 355 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near January 8 and the first fall freeze near December 29. Turning to energy use, 569 heating degree days and 4,220 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Harlingen Rio Grande scores 95/100 (Excellent), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, August-driven heat peaks in summer, and January-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.
Frequently Asked Questions
What is the average temperature in Harlingen Rio Grande, TX? ▼
The average annual temperature in Harlingen Rio Grande, Texas is 75°F. The warmest month averages 97°F (36°C) and the coldest averages 50°F (10°C).
How much rain does Harlingen Rio Grande get? ▼
Harlingen Rio Grande receives 24.0 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Harlingen Rio Grande? ▼
Harlingen Rio Grande has a climate comfort score of 95/100 (Excellent), milder than 98% of U.S. cities in the PlainClimate database.
When is the growing season in Harlingen Rio Grande? ▼
Harlingen Rio Grande has approximately 355 frost-free days per year, with the last spring freeze around January 8 and the first fall freeze around December 29.
How much energy does heating and cooling require in Harlingen Rio Grande? ▼
Harlingen Rio Grande has 569 heating degree days and 4,220 cooling degree days annually, a cooling-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Harlingen Rio Grande climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00012904 near Harlingen Rio Grande.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00012904. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.