Hillsboro, TX Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Hillsboro's primary NOAA station, HILLSBORO.
The climate verdict for Hillsboro
Hillsboro, Texas has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 66°F. It scores 93/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 93% of them.
- 66°F
- average temperature, NOAA 1991-2020 normal
- 93/100
- comfort score, above 93% of station-mapped location scores
- 38.7"
- annual precipitation · 1" snow
- 234 days
- frost-free days per growing season
Hillsboro: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00414182 · Hillsboro, TX 66°F mean · 38.7" precip
TEMP-MILD · RANK-WARM · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-TOP · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 66°F
- RANK-WARM #6,175
- PHOTO-FINISH ≈ Chino
- PRCP-MID 38.7"
- SWING-MID 38°F
- COMF-TOP 93/100
- LOAD-MIX H/C balanced
- STN-1 USC00414182
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Chino, CA (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every TX station list.
- Hillsboro (this station) 66°F
- Hot Greenville Cren…, AL 66°F
- Near Chino, CA 66°F
- Near Coden, AL 66°F
- Near Glennville, GA 66°F
Hillsboro sits in Texas, the #4 hottest U.S. state at 66.2°F statewide annual average - see all 50 hottest states ranked by NOAA normals
Climate Living Index · Hillsboro
Hillsboro: 84/100 · grade B
Hillsboro publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Hillsboro, not an official NOAA rating. Rankings still use Comfort Score 93/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 66.1°F · 1.4° from 67.5°F | 94/100 · A |
| Precipitation balance | 38.7 in · 3.7 from 35 in | 86/100 · A |
| Snowfall burden | 0.7 inches/year | 85/100 · A |
| Frost-free season | 234 days/year | 83/100 · B |
| Normal heat + freeze calendar | 103 calendar days | 74/100 · B |
Hillsboro · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Hillsboro is a temperate Köppen climate: Cfa
Coldest-month mean 46.5°F and warmest-month mean 84.9°F place this station in temperate, no dry season, hot summer climates (Cfa). Class Cfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, hot summer.
- Köppen code
- Cfa
- Group
- Temperate
- Warmest month
- 84.9°F
- Coldest month
- 46.5°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · balanced station
Where Hillsboro sits across the climate record
Three NOAA fields for Hillsboro's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 10% warmest
- Among 6,861 stations, Hillsboro sits in the warmer third of annual means.
- Annual precipitation
- 55th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 71%
- Warmest-to-coldest month gap for Hillsboro is compact versus 6,861 complete station-years.
How Hillsboro compares across U.S. station-mapped locations
Hillsboro's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
93 Top 7% score exceeds 93% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). Below this entry.
- 80–90: 921 station-mapped locations (15%). Below this entry.
- 90–100: 564 station-mapped locations (9%). This entry sits in this band.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Hillsboro's measured station temperature trend
MethodologyAcross 48 complete annual observations from 1952 to 2025, HILLSBORO warmed at a fitted rate of 0.21°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Hillsboro primary station fitted change +0.22 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 59°F (15°C) | 34°F (1°C) | 47°F (8°C) | 2.7" | 0.1" | 12.1 | 0.0 |
| February | 63°F (17°C) | 38°F (3°C) | 50°F (10°C) | 2.8" | 0.3" | 7.1 | 0.1 |
| March | 70°F (21°C) | 45°F (7°C) | 57°F (14°C) | 3.6" | 0.1" | 2.9 | 0.2 |
| April | 77°F (25°C) | 53°F (12°C) | 65°F (18°C) | 3.7" | 0.0" | 0.2 | 0.9 |
| May | 84°F (29°C) | 62°F (17°C) | 73°F (23°C) | 4.5" | 0.0" | 0.0 | 5.5 |
| June | 92°F (33°C) | 70°F (21°C) | 81°F (27°C) | 3.6" | 0.0" | 0.0 | 20.3 |
| July | 96°F (36°C) | 73°F (23°C) | 84°F (29°C) | 1.6" | 0.0" | 0.0 | 29.1 |
| August | 97°F (36°C) | 73°F (23°C) | 85°F (29°C) | 2.2" | 0.0" | 0.0 | 27.6 |
| September | 91°F (33°C) | 66°F (19°C) | 78°F (26°C) | 3.1" | 0.0" | 0.0 | 17.2 |
| October | 80°F (27°C) | 55°F (13°C) | 68°F (20°C) | 5.0" | 0.0" | 0.4 | 3.9 |
| November | 69°F (20°C) | 44°F (7°C) | 56°F (13°C) | 2.7" | 0.0" | 3.9 | 0.0 |
| December | 60°F (16°C) | 36°F (2°C) | 48°F (9°C) | 3.1" | 0.2" | 10.2 | 0.0 |
The year, day by day
The year in Hillsboro runs from a mild 34°F around January 6 to 98°F at the peak near August 5, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from June 7 through September 17, covering 103 dates. The broader mild season, normal highs of 70°F or more, runs March 18 to November 11.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 34°F around January 6.
Where the wet dates fall
The likeliest wet date is May 6, when 26% of years recorded at least a hundredth of an inch. The driest is July 24 at 13%. Summed across the calendar, that is about 80 wet dates a year.
The widest day
January 26 carries the biggest normal gap between afternoon and dawn, 26°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Hillsboro.
Where Hillsboro Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 103 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
Hillsboro earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 0.1"
7.4 days with precipitation
Snow: 0.3"
7.1 days with precipitation
Snow: 0.1"
8.0 days with precipitation
7.1 days with precipitation
8.6 days with precipitation
6.6 days with precipitation
4.2 days with precipitation
4.5 days with precipitation
5.6 days with precipitation
6.9 days with precipitation
6.8 days with precipitation
Snow: 0.2"
7.4 days with precipitation
Hillsboro spreads its precipitation across the year
Neither half of the year dominates here: June through August take 19% of the annual total and December through February 22%, with neither reaching the 35% that would mark a distinct wet season. Hillsboro has no dry season to plan around, though it does carry a 38.4°F seasonal spread.
The gap between the wettest and driest month still matters: October averages 5.0" and July 1.6". The three wettest months together take 34% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Hillsboro, it arrives in quantity
38.7" of precipitation falls across only about 80 wet days here, averaging 0.48 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 80 a year, 22% of all days
- Average depth per wet day
- 0.48 inches
- Most wet days
- May, about 9
- Fewest wet days
- July, about 4
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Snow reaches Hillsboro, but rarely amounts to much
The normals record 0.7 inches of snow a year here, most likely in February. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 0 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
November 10
50% probability date
Last Spring Freeze
March 21
50% probability date
Growing Season
234 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,257
Higher = more heating needed
Cooling Degree Days
2,675
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside TX closest to Hillsboro on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (66°F here).
- Chino, CA 66°F · 0.0°F off
- Glennville, GA 66°F · 0.0°F off
- Hazlehurst, GA 66°F · 0.0°F off
- Meadview, AZ 66°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (38.7" here), excluding temperature-peer places.
- Osceola, IA 38.7" · 0.0" off
- Cedar Rapids, IA 38.8" · 0.0" off
- Oskaloosa, IA 38.7" · 0.0" off
- Wilkes-barre, PA 38.7" · 0.0" off
Data-derived climate profile
How Hillsboro's climate pattern fits together
mixed demand · moderate · mid swing
August and January mark the typical warm and cold ends of the calendar in Hillsboro's middle-range seasonal profile. The measured spread is 38.4°F. The annual average is 66°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Heating and cooling both register in Hillsboro's normal, at 2,257 and 2,675 degree days respectively. Neither total exceeds the other by more than two to one, so the record is better read as a mixed-demand calendar than as heating-led or cooling-led.
A roughly 234-day frost-free season sits inside this mixed heating-and-cooling profile. Start and end dates matter because both sides of the thermostat register during a normal year.
Hillsboro's 38.7 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Annual snowfall totals 0.7 inches. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Hillsboro's primary station, where heating and cooling demand are close enough that neither season sets the character on its own. On a balanced station like Hillsboro, the bands are descriptive ranges rather than an official NOAA classification or a forecast.
Questions about Hillsboro's climate
How much rain does Hillsboro get? ▼
How many days above 90°F does Hillsboro get? ▼
How much energy does heating and cooling require in Hillsboro? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Hillsboro's primary station: HILLSBORO (USC00414182). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 4834088). Match rule for Hillsboro: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Hillsboro comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.