Isabela climate — normals and trends
Isabela has a tropical rainforest climate, averaging 26.3 °C annually with 1,953 mm of rain per year.
Climate normals · ERA5
IsabelaAutonomous Region in Muslim Mindanao
- coords
- 6.70°, 121.97°
- period
- 1940–2025 · 86 yrs
The normals for this period
The average of every indicator across the whole window: temperature, water, sky, wind and notable days.
Mean daily temperature
26.3°C
Average daily high
28.0°C
Average daily low
24.9°C
Annual rainfall
1,953mm
Sunshine / day
10.7h
Mean relative humidity
84%
Average peak wind
11.6km/h
Seasonal range
0.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
8 d/yr
Rainy days (≥ 1 mm)
284 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.0 °C
Average feels-like low
29.3 °C
Average peak gust
22.6 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
20.3 MJ/m²
Has the climate changed?
What the yearly averages say about warming here, and whether the slope is statistically solid.
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.70 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
Climate month by month
How an average year unfolds: when it rains, when it turns hot, when the sun is out.
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
The most extreme days ever measured here, then the year-by-year detail.
Hottest day
31.7 °C
8 April 2016
Coldest day
22.5 °C
23 January 1965
Wettest day
211 mm
22 November 2013
Windiest day
40.9 km/h
28 November 1955
Strongest gust
73.8 km/h
13 November 1990
Hottest feels-like
39.9 °C
8 May 2020
Coldest feels-like
22.9 °C
19 December 2003
Sunniest day
12.0 h
26 May 1988
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and compare it with the normal: warmer, drier, more extreme?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 28.5 °C | +0.7 °C | 212 mm | +105 mm |
| Feb | 28.4 °C | +0.4 °C | 128 mm | +37 mm |
| Mar | 28.7 °C | +0.3 °C | 253 mm | +153 mm |
| Apr | 28.8 °C | 0.0 °C | 225 mm | +108 mm |
| May | 28.8 °C | +0.2 °C | 308 mm | +130 mm |
| Jun | 28.2 °C | +0.2 °C | 248 mm | +29 mm |
| Jul | 28.7 °C | +1.1 °C | 138 mm | -73 mm |
| Aug | 28.0 °C | +0.3 °C | 327 mm | +131 mm |
| Sep | 28.4 °C | +0.6 °C | 255 mm | +57 mm |
| Oct | 28.2 °C | +0.4 °C | 416 mm | +203 mm |
| Nov | 28.5 °C | +0.6 °C | 201 mm | +15 mm |
| Dec | 28.6 °C | +0.7 °C | 185 mm | +49 mm |
The year's extremes
What was the weather like that day?
The weather actually measured on a given date, anywhere in the covered window.
Climate at a glance
What these normals say about the place, in a few sentences, and the notions needed to read them.
Isabela (Philippines) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.3 °C and it receives 1,953 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is April (26.8 °C on average) and the coldest is January (26.1 °C). Rainfall peaks in June.
Isabela averages 0 frost days, 8 hot days (≥ 30 °C) and 284 rainy days per year.
Isabela has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The hottest day of the period reached 31.7 °C (on 8 April 2016) and the coldest 22.5 °C (on 23 January 1965).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Compare Isabela with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Isabela
Other cities — Philippines
Frequently asked questions
What is the climate of Isabela?
Isabela has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.3 °C and it receives 1,953 mm of precipitation per year.
What is the hottest day ever recorded in Isabela?
The hottest day measured in Isabela between 1940 and 2025 was 8 April 2016, reaching 31.7 °C.
What is the coldest day in Isabela?
The coldest day measured in Isabela between 1940 and 2025 was 23 January 1965, at 22.5 °C.
Does it snow in Isabela?
Almost never: Isabela sees virtually no snow, with about 0 frost days per year.
Has the climate of Isabela warmed?
Yes: Isabela warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Isabela?
The wettest day measured in Isabela between 1940 and 2025 was 22 November 2013, with 211 mm of rain in 24 hours.
What was the windiest day in Isabela?
The windiest day measured in Isabela between 1940 and 2025 was 28 November 1955, with winds reaching 40.9 km/h.
What is the warmest month in Isabela?
The warmest month in Isabela is April (26.8 °C on average); the coldest is January (26.1 °C).
How much does it rain in Isabela?
Isabela receives on average 1,953 mm of precipitation per year, spread over about 284 rainy days.
Is it sunny in Isabela?
Isabela gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.
Are there tropical nights in Isabela?
Yes: Isabela has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Isabela?
In Isabela, between 1940 and 2025, the highest apparent temperature reached 39.9 °C on 8 May 2020, and the lowest was 22.9 °C on 19 December 2003.
These forecasts and records come from our own weather API. Developer documentation →