Kahului, HI Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Kahului's primary NOAA station, KAHULUI AP.
The climate verdict for Kahului
Kahului, Hawaii is cooling-led and dry. Its 16.2 inches of annual precipitation pairs with an annual average of 77°F. August is the warmest month at 81°F and January the coldest at 73°F.
- 77°F
- annual average temperature (NOAA normal)
- 16.2"
- precipitation, annual total
Kahului: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00022516 · Kahului, HI 77°F mean · 16.2" precip
TEMP-HOT · RANK-WARM · PHOTO-FINISH · PRCP-DRY · SWING-NARROW · COMF-UNK · LOAD-COOL · STN-1 · BOOK-FULL
- TEMP-HOT 77°F
- RANK-WARM #6,792
- PHOTO-FINISH ≈ Miami Opa Locka
- PRCP-DRY 16.2"
- SWING-NARROW 8°F
- COMF-UNK Comfort n/a
- LOAD-COOL 4,423 CDD
- STN-1 USW00022516
- BOOK-FULL 5/6 fields
Nearest mean-temperature peer: Miami Opa Locka, FL ( -0.2 °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 HI station list.
- Kahului (this station) 77°F
- Cold Kaneohe Bay Mcas, HI 77°F
- Near Miami Opa Locka, FL 77°F
- Near Ke-ahole Point, HI 77°F
- Near Miami Nwsfo, FL 77°F
Kahului sits in Hawaii, the #2 hottest U.S. state at 72.4°F statewide annual average - see all 50 hottest states ranked by NOAA normals
Climate Living Index · Kahului
Kahului: 62/100 · grade C
Kahului publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals · NOAA hourly normals); 2 missing weights rescale to 100.
PlainClimate-derived for Kahului, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 36 calendar days | 94/100 · A |
| Annual temperature balance | 77.1°F · 9.6° from 67.5°F | 69/100 · C |
| Precipitation balance | 16.2 in · 18.8 from 35 in | 33/100 · F |
| Summer moisture balance | 67.5°F mean dew point | 24/100 · F |
Kahului · 2026-08-04 · NOAA NCEI Climate Normals · method .
Kahului's normals sit in a dry climate class: BSh
Precipitation is low relative to temperature but above true desert thresholds: hot semi-arid steppe (BSh). Class BSh is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically hot semi-arid steppe.
- Köppen code
- BSh
- Group
- Dry (arid or semi-arid)
- Warmest month
- 81.1°F
- Coldest month
- 72.9°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 · cooling-led station
Where Kahului sits across the climate record
Three NOAA fields for Kahului's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 1% warmest
- Among 6,861 stations, Kahului sits in the warmer third of annual means.
- Annual precipitation
- Drier than 80%
- Kahului's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 99%
- Warmest-to-coldest month gap for Kahului is compact versus 6,861 complete station-years.
Kahului's measured station temperature trend
MethodologyAcross 54 complete annual observations from 1955 to 2025, KAHULUI AP warmed at a fitted rate of 0.22°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Kahului 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 | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 82°F (28°C) | 64°F (18°C) | 73°F (23°C) | 2.4" | 0.0 | 0.0 |
| February | 82°F (28°C) | 64°F (18°C) | 73°F (23°C) | 2.0" | 0.0 | 0.0 |
| March | 83°F (28°C) | 65°F (18°C) | 74°F (23°C) | 2.6" | 0.0 | 0.0 |
| April | 85°F (29°C) | 67°F (19°C) | 76°F (24°C) | 1.3" | 0.0 | 0.3 |
| May | 87°F (30°C) | 68°F (20°C) | 77°F (25°C) | 0.7" | 0.0 | 1.6 |
| June | 88°F (31°C) | 70°F (21°C) | 79°F (26°C) | 0.2" | 0.0 | 3.4 |
| July | 89°F (32°C) | 72°F (22°C) | 81°F (27°C) | 0.5" | 0.0 | 6.5 |
| August | 90°F (32°C) | 72°F (22°C) | 81°F (27°C) | 0.5" | 0.0 | 8.6 |
| September | 90°F (32°C) | 71°F (22°C) | 81°F (27°C) | 0.5" | 0.0 | 9.9 |
| October | 89°F (32°C) | 70°F (21°C) | 79°F (26°C) | 0.8" | 0.0 | 6.6 |
| November | 86°F (30°C) | 68°F (20°C) | 77°F (25°C) | 1.8" | 0.0 | 1.6 |
| December | 83°F (29°C) | 66°F (19°C) | 75°F (24°C) | 2.8" | 0.0 | 0.2 |
The year, day by day
The year in Kahului runs from a mild 63°F around January 16 to 90°F at the peak near August 26, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from August 18 through September 22, covering 36 dates. The broader mild season, normal highs of 70°F or more, runs January 1 to December 31.
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 63°F around January 16.
Where the wet dates fall
The likeliest wet date is March 1, when 33% of years recorded at least a hundredth of an inch. The driest is June 4 at 15%. Summed across the calendar, that is about 93 wet dates a year.
The widest day
May 14 carries the biggest normal gap between afternoon and dawn, 19°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Kahului.
Where Kahului Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 19°F.
Kahului 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
8.3 days with precipitation
9.1 days with precipitation
10.2 days with precipitation
8.6 days with precipitation
6.1 days with precipitation
4.8 days with precipitation
7.7 days with precipitation
7.4 days with precipitation
5.0 days with precipitation
6.5 days with precipitation
9.2 days with precipitation
10.0 days with precipitation
Kahului's wet season runs through the cold months
December, January and February carry 45% of the year's precipitation here, while June through August contribute 8%. That is the cool-season-dominant pattern of the West Coast and the higher inland West, where storm tracks swing south in winter and summer turns dry; the thermometer meanwhile shows an unusually narrow 8.2°F seasonal spread.
- Wettest month
- December, 2.8"
- Driest month
- June, 0.2"
- Wettest three months
- December, March, January (48% of the year)
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A cool-season label means the December-February share reaches 35%. Where snow falls, the monthly figures above report liquid-equivalent precipitation, so a wet winter month is not necessarily a rainy one.
Kahului is dry, and what does fall arrives gently
Only about 93 days a year record measurable precipitation here, 25% of the calendar, and they carry 16.2" between them. At roughly 0.17 inches on an average wet day, this is not the damp drizzle of a marine climate; it is an arid record in which precipitation is both uncommon and light when it appears.
The wettest month by count is March at about 10 wet days; the driest is June at about 5.
A low per-event average in a dry record is a statement about typical days only. Arid regions can still take a large share of a year's total from a single convective storm, which a normal cannot show.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, not the extremes within it.
Frost Dates & Growing Season
First Fall Freeze
N/A
50% probability date
Last Spring Freeze
N/A
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
0
Higher = more heating needed
Cooling Degree Days
4,423
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 74% | 10.6 | 29% | 9% |
| February | 72% | 11.0 | 26% | 8% |
| March | 72% | 12.3 | 26% | 9% |
| April | 70% | 12.2 | 25% | 10% |
| May | 69% | 13.1 | 29% | 4% |
| June | 68% | 14.5 | 24% | 4% |
| July | 69% | 14.8 | 25% | 5% |
| August | 69% | 13.6 | 27% | 6% |
| September | 70% | 11.8 | 32% | 5% |
| October | 72% | 11.1 | 31% | 6% |
| November | 73% | 11.6 | 30% | 10% |
| December | 74% | 10.4 | 33% | 8% |
Nationwide similar cities
Other rankable U.S. places outside HI closest to Kahului 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 (77°F here).
- Miami, FL 77°F · 0.3°F off
- Duck Key, FL 78°F · 0.4°F off
- Hialeah, FL 77°F · 0.5°F off
- Tavernier, FL 78°F · 0.7°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (16.2" here), excluding temperature-peer places.
- Melrose, NM 16.2" · 0.0" off
- Taylor, ND 16.2" · 0.0" off
- Akron, CO 16.2" · 0.0" off
- Lamar, CO 16.2" · 0.0" off
Data-derived climate profile
How Kahului's climate pattern fits together
cooling led · dry · low swing
Warm-season load persists through a relatively even calendar in Kahului. Cooling totals 4,423 degree days, more than double the 0 heating measure, and the 8.2°F seasonal range is compact rather than sharply divided.
Heat demand sits beside limited local precipitation: Kahului receives 16.2 inches in a normal year, inside PlainClimate's dry range. Snowfall is not added to the interpretation because its annual value is missing. Month-level precipitation is the useful check on when that small annual total arrives.
The calendar stays thermally compact and dry. August and January mark the typical warm and cold ends of the calendar, only 8.2°F apart, while the annual precipitation total remains below PlainClimate's dry threshold. The annual average is 77°F. The monthly rows show whether that limited precipitation is spread through the year or concentrated in a shorter interval.
A frost-free growing-season length is not available for Kahului. That missing field is kept separate from the observed temperature and precipitation record rather than filled from a regional estimate.
These labels group NOAA 1991-2020 normals from Kahului's primary station, so the summer figures are a thirty-year average rather than a ceiling: individual years have run hotter and will again. For Kahului that means a descriptive range only — not an official NOAA classification and not a prediction for next summer.
Questions about Kahului's climate
How much rain does Kahului get? ▼
How many days above 90°F does Kahului get? ▼
How much energy does heating and cooling require in Kahului? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Kahului's primary station: KAHULUI AP (USW00022516). 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 a census-designated place (GEOID 1522700), not an incorporated municipality. Match rule for Kahului: 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 Kahului 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.