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Kealakekua climate
Typical historical weather for Kealakekua, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
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Annual average
11.9°C
across all months
Warmest month
16.5°C
Sep average high
Coolest month
8.2°C
Feb average low
Annual rainfall
1013mm
total per year
Kealakekua is typically hottest in September and coolest in February, a swing of about 8.3°C across the year. About 55% of annual rainfall falls in the three wettest months (January is typically wettest, July driest).
Monthly averages
Average daily high/low temperature (band) and monthly rainfall (bars).
| Month | Avg high | Avg low | Rainfall | Wet days | Humidity | Wind | Cloud | Solar |
|---|---|---|---|---|---|---|---|---|
| Jan | 11.9°C · record 13.4–18°C | 8.8°C · record 4.7–6°C | 221mm | 14 | 84% | 4.7 m/s | 64% | 2.1 kWh/m² |
| Feb | 11.7°C · record 13–19.3°C | 8.2°C · record 2.3–7.3°C | 167mm | 9 | 81% | 5.5 m/s | 51% | 3.3 kWh/m² |
| Mar | 11.3°C · record 12–19°C | 8.2°C · record 3.2–7.5°C | 157mm | 13 | 83% | 5.2 m/s | 55% | 4.4 kWh/m² |
| Apr | 12.2°C · record 14.5–22.5°C | 8.8°C · record 4.8–8.4°C | 56mm | 6 | 83% | 5.8 m/s | 48% | 6.2 kWh/m² |
| May | 13.2°C · record 15.5–19.9°C | 9.7°C · record 6.3–8.9°C | 28mm | 3 | 84% | 6.5 m/s | 42% | 7.2 kWh/m² |
| Jun | 14.8°C · record 16.5–26.3°C | 11.1°C · record 8.6–10.2°C | 5mm | 1 | 82% | 6.8 m/s | 37% | 8 kWh/m² |
| Jul | 15.4°C · record 17–22.2°C | 11.7°C · record 9.1–11°C | 4mm | 0 | 86% | 6 m/s | 38% | 7.8 kWh/m² |
| Aug | 16.1°C · record 17.4–21.7°C | 12.6°C · record 9.8–12.1°C | 4mm | 0 | 87% | 5.3 m/s | 40% | 6.9 kWh/m² |
| Sep | 16.5°C · record 17.8–29.2°C | 13°C · record 10.1–12.5°C | 14mm | 1 | 84% | 4.9 m/s | 37% | 5.6 kWh/m² |
| Oct | 15.8°C · record 17.4–26.6°C | 12.1°C · record 8.5–11.2°C | 59mm | 5 | 81% | 4.5 m/s | 37% | 4 kWh/m² |
| Nov | 13.6°C · record 14.7–20.1°C | 10.3°C · record 4.7–9.2°C | 126mm | 8 | 83% | 4.2 m/s | 49% | 2.7 kWh/m² |
| Dec | 12.1°C · record 13.9–18°C | 9.1°C · record 5–8.6°C | 171mm | 12 | 84% | 4.5 m/s | 63% | 2 kWh/m² |
"Avg high"/"Avg low" is the mean daily high/low for that month, averaged across every year on file. The "record" figure alongside it is a different statistic — the single hottest (or coldest) hour ever recorded during that month across all years — so it can sit above or below the average and does not describe the average's year-to-year spread. A "wet day" is any day with at least 1.0mm of rain.
Year to year
Annual average temperature, 2016–2025.
Across these 10 years, the annual average has moved by about -0.63°C per decade. That’s a short window for a reliable long-term climate trend — treat it as indicative, not definitive.
Annual rainfall has moved by about +74.09mm per decade over the same period.
2025 (the most recent year on file) averaged 11.837632005944121°C, below the 9-year baseline of 11.89°C by 0.17 standard deviations.
Typical extremes per year
Rainy days
72.1 days
≥1.0mm rain
Heavy rain days
16.6 days
≥20mm rain
Extreme heat days
0 days
daily high ≥40°C
Frost days
0 days
daily low ≤0°C
Averaged across 10 years on file. Thresholds match PastClimate's data pipeline definitions — see data & sources.
Records on file
Ranked across 10 years of data currently on file (2016–2025).
Hottest day
29.2°C
1 September 2017
2017 was 1.09 SD above the 9-year average that year
Coldest day
2.3°C
24 February 2023
2023 was 1.27 SD below the 9-year average that year
Wettest day
125.9mm
20 November 2024
2024 was 0.66 SD above the 9-year average that year
Windiest day
13.7m/s
4 February 2024
2024 was 0.66 SD above the 9-year average that year
See the detail: Kealakekua on 20 November 2024.
Nearby cities
East Honolulu
Same ERA5 grid cell
Hilo
Same ERA5 grid cell
Hawai‘i Kai
Same ERA5 grid cell
Kahului
Same ERA5 grid cell
Kīhei
Same ERA5 grid cell
Niu Valley
Same ERA5 grid cell
Want a side-by-side view instead? Compare Kealakekua with another city.
Frequently asked questions about Kealakekua's climate
What is the hottest month in Kealakekua?
September is typically the warmest month in Kealakekua, with an average high of 16.5°C. February is typically the coolest, averaging 8.2°C overnight.
How much does it rain in Kealakekua?
Kealakekua gets about 1013mm of rain a year on average, with roughly 55% of it falling in the three wettest months (January is typically the wettest, July the driest).
How many extremely hot or cold days does Kealakekua have?
On average, Kealakekua sees about 0 day(s) a year at or above 40°C and about 0 day(s) at or below 0°C, based on 10 years of data.
Is Kealakekua getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about -0.63°C per decade. That's a short window for a reliable long-term climate trend — treat it as indicative, not definitive.
What is the hottest day on record for Kealakekua?
The hottest day on file is 1 September 2017 at 29.2°C, out of 10 year(s) searched.
Data & provenance
↓ Download monthly CSVData source & coverage — ERA5 reanalysis, 2016–2025 (10 years)details
- Source
- ERA5 reanalysis, accessed via the Copernicus Climate Change Service (C3S) Climate Data Store
- Data type
- Reanalysis — a physically consistent reconstruction combining a forecast model with historical observations, not a live station reading or a forecast
- Coverage
- 2016–2025 (10 years) for United States
- Location
- Kealakekua — 38.750°, -123.500°, ERA5 grid cell center, 3773.9 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- Monthly and annual averages, and dated extreme-value records, derived from an hourly base record.
- Spatial resolution
- 0.25° (~25 km) distributed grid — ERA5's native model resolution is finer; this is the publicly distributed regridded product
- Version / refreshed
- Methodology v2026.07 · data last refreshed December 31, 2025
- Limitations
- A model reconstruction, not a station observation — hyper-local extremes (a single storm cell, an urban heat pocket) can differ from a nearby gauge. See the full methodology.
- Attribution
- Generated using Copernicus Climate Change Service information
Cite this data
PastClimate (2026-07-18). Historical climate data for Kealakekua, United States (38.75°N, 123.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Kealakekua, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Kealakekua, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Kealakekua, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-18},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.