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Miri weather by month: averages, rainfall & climate trends

Warmth in Miri is remarkably steady: only 1.4°C separates the warmest month from the coolest, so there is no cold season to speak of. The heavier rain months run from September to January. Miri weather by month: average temperatures, rainfall, extremes and how the climate has changed since 1940.

Today vs average

+2.5°Chigh above average

30° / 26°Today
28° / 25°Average
see today in detail →

How it's changed

+1.0°Caverage temperature, 2016–2025 vs 1940–1949average temperature vs 1940–499days above 30°C a year now (2016–2025) · 0 in the 1940sdays above 30°C · 0 in the 1940s+1.0°C vs the 1940s · see how it's changed →
Weather by montha typical year, averaged over the full recordJanuary, rain 217 mmhigh 27°low 25°February, rain 110 mmhigh 27°low 25°March, rain 98 mmhigh 27°low 25°April, rain 126 mmhigh 28°low 26°May, rain 175 mmhigh 29°low 26°June, rain 196 mmhigh 29°low 26°July, rain 188 mmhigh 28°low 26°August, rain 198 mmhigh 28°low 26°September, rain 234 mmhigh 28°low 25°October, rain 285 mmhigh 28°low 25°November, rain 306 mmhigh 28°low 25°December, rain 285 mmhigh 27°low 25°wettest month November, 306 mm · 2,418 mm a yearsee month by month →

Right now

What it's doing today vs the historical average for this date.
Showers

Right now

26.5°

32°feels like
91%humidity
25°dew point
7 km/hfrom S
UV index0.0
sunrise06:08sunset18:08day length12h 00m
WedShowers30°26°
ThuOvercast31°27°
FriShowers30°27°
SatShowers29°27°
SunOvercast30°27°
MonOvercast30°27°
TueOvercast30°27°

On this date: October 20

Today (forecast)
30° / 26°
Average for October 20
28° / 25°

High above average · +2.5°C

  • Highest since 1940: 29.2° · 2000
  • Lowest since 1940: 24.0° · 1964
  • One year ago: 29° / 26°

Every October 20 in history, coldest to hottest

▲ Daily highs▼ Daily lows

Dots show daily highs (top) and lows (bottom) for each October 20 on record (n = 87). Outlined dots are today's forecast.

Area we sample

Each city's history comes from one ERA5 grid cell, about 28 km across, shown by the dashed box. Near mountains or coasts, conditions can vary across the cell.

Location & data

Historical weather for Miri is sampled from the ECMWF ERA5 reanalysis at 4.40°N, 113.99°E, with daily records since 1940.

Coordinates
4.40°N, 113.99°E
Time zone
Asia/Kuching
Period
1940–2026
Data source
ERA5 (ECMWF)

Last 30 days

31 of the last 31 days were warmer than the historical average for that date. Average difference: +1.4°C.

Each bar is one day, from morning low to afternoon high. Warm-colored bars are days whose mean ran above average; cool bars ran below. The dot inside the bar is the daily mean. The shaded band is the typical 10–90% range expected for that date. Average = the day's mean temperature averaged across every year of record (1940–2026) for that calendar date.

This date over the years

One dot per year, showing the mean temperature on this calendar date. Dots are warmer or cooler than the long-term average (dashed line); the shaded band is the typical 10–90% range, and the highlighted dot is today's forecast. Based on ERA5 reanalysis: modelled estimates, not station readings.

Weather by month

Average temperatures and rainfall for each month: a typical year, from the full record.

Climate overview

The year peaks in June, at around 28.5°C by mid-afternoon, with nights around 26.0°C. At the other extreme, February brings afternoon highs of about 26.8°C and typical overnight lows of 24.9°C.

The yearly total for Miri comes to about 2,418 mm; monthly amounts range from 98 mm in March up to 306 mm in November.

Over the full record (since 1940), the annual mean temperature in Miri has risen by 1.0°C between its first decade and its last. That last decade has also been the warmest in the record.

Climate graph (climograph)

June is the warmest month, February the coolest: a yearly swing of 1°C. Wettest month: November (~306 mm). Whole year averages ~2,418 mm of rain.

Bars = average monthly rainfall (right axis). Lines = average daily high and low (left axis). Average = each month's value averaged across every year of record (1940–2026).

Monthly wind

Average daily peak wind at 10 m, by month.

Monthly solar energy

Average daily incoming solar energy in megajoules per square metre: the record's own proxy for how sunny the month is.

Miri month by month: what to expect

Typical conditions for each month, averaged across the full record (since 1940). Daylight is the time from sunrise to sunset. Highest and Lowest are the most extreme values in the ERA5 dataset (modelled since 1940), so they can differ from official weather-station readings.

MonthAvg highAvg lowRainDaylightHighestLowest
January26.9°24.9°217 mm11.8 h29.3° (2025)22.9° (1972)
February26.8°24.9°110 mm11.9 h29.4° (1950)22.9° (2009)
March27.3°25.2°98 mm12.0 h29.7° (1998)23.1° (1955)
April28.0°25.7°126 mm12.1 h30.0° (2024)23.7° (1943)
May28.5°26.1°175 mm12.2 h31.1° (2016)24.3° (1949)
June28.5°26.0°196 mm12.3 h31.0° (2012)23.9° (1999)
July28.4°25.8°188 mm12.2 h31.0° (1978)23.4° (1956)
August28.3°25.7°198 mm12.1 h30.8° (2019)23.6° (1971)
September28.0°25.5°234 mm12.0 h30.9° (2024)23.7° (1956)
October27.7°25.3°285 mm11.9 h30.1° (2021)23.7° (1942)
November27.5°25.1°306 mm11.8 h29.7° (2025)23.6° (1971)
December27.3°25.0°285 mm11.7 h30.0° (1953)23.4° (1945)

How it's changed

Year-by-year signals from 1940 to today.

Climate stripes

Annual mean shifted from 1940–1949 to 2016–2025 by +1.0°C.

Each vertical stripe is one year. Color encodes how much that year's annual mean differed from the long-term average. Average = each year's annual mean compared to the average of all years (1940–2026). cooler ← → warmer

Annual mean temperature

Long-term trend: +0.12°C per decade.

One point per year, showing the temperature averaged across the whole year. The dashed line is the least-squares long-term trend. Based on ERA5 reanalysis: modelled estimates, not station readings.

Seasonal warming

Sep–Nov is warming fastest: +0.14°C per decade.

Each faint line is one three-month period's average per year; the bold dashed line is its long-term trend. Different parts of the year often warm at different rates. Based on ERA5 reanalysis: modelled estimates, not station readings.

Hot days vs frost days

Days ≥ 30°C per year: 0.1 early in the record → 8.9 recently. Frost days: 0 → 0.

Thin lines are raw yearly counts; thick lines are the smoothed trend that removes year-to-year noise. The hot-day threshold is auto-picked per city so the line actually moves. Average = a centered 5-year rolling average to smooth weather noise.

Yearly hot & cold extremes

Hottest day since 1940 in 2016, coldest in 2009: 31.1°C / 22.9°C.

One point per year: the single hottest and coldest day recorded that year.

Annual rainfall

~2,418 mm/year on average. Last decade: +9% vs that average. Long-term trend: +32 mm per decade.

One bar per year of total rainfall. Dashed line is the long-term average. Average = the average annual rainfall across every year of record (1940–2026).

Day-by-day grid

Each tiny square is one calendar day across the full record, about 30,000 days per city. Use the mode switch above the chart: Anomaly colors each day by how far it ran from the historical average for that date (red = warmer, blue = cooler), Daily mean temp shows the absolute mean temperature for the day (useful to see seasons and heatwaves), and Precipitation shows daily rainfall (useful to spot wet/dry seasons and droughts). Average = the long-term average for that calendar date (1940–2026).

Frequently asked questions about Miri

Which is the warmest month in Miri?
On long-term average, the warmest month in Miri is June (mean daily temperature of about 27.4°C) and the coolest is February (about 25.9°C).
How does today's temperature in Miri compare to the historical average?
On October 20, 2026, Miri is forecast to reach a high of 30.1°C and a low of 26.4°C. The long-term average for this date (the full record since 1940) is a high of 27.6°C and a low of 25.2°C, so today's high is 2.5°C warmer than that average.
How much has Miri warmed since 1940?
Comparing the first decade of the record (1940–1949) with the most recent (2016–2025), the annual mean temperature in Miri is about 1.0°C warmer.
How much does it rain in Miri?
Miri receives about 2,418 mm of precipitation per year on long-term average, with November typically the wettest month.
What is the average temperature in Miri?
Over the full record (since 1940), the annual mean temperature in Miri is about 26.7°C. The warmest month is June and the coolest is February.
What are the average temperatures in Miri by month?
Average daily highs and lows for each month in Miri (°C, full record since 1940): January 27°/25°, February 27°/25°, March 27°/25°, April 28°/26°, May 29°/26°, June 29°/26°, July 28°/26°, August 28°/26°, September 28°/25°, October 28°/25°, November 28°/25°, December 27°/25°.

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