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Miri weather by month — averages, rainfall & climate trends

Average temperatures and rainfall by month, a climate graph, today's conditions versus the long-term average, and how the climate has shifted since 1940 — all on one page for Miri, Malaysia.

Right now

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

Right now

30.7°

35°feels like
64%humidity
23°dew point
11 km/hfrom SW
sunrise06:20sunset18:40day length12h 20m
TodayOvercast31°25°
ThuOvercast30°27°
FriOvercast30°26°
SatOvercast32°26°
SunOvercast32°26°
MonOvercast31°26°
TueOvercast30°26°

On this date — July 22

Today (forecast)
31° / 25°
Average for July 22
28° / 26°

Warmer than usual · 2.3°C above the average high

  • Record high: 30.5° · 2018
  • Record low: 24.5° · 1979
  • One year ago: 29.9°

Every July 22 in history — coldest to hottest

Daily highsDaily lows

Dots show daily highs (top) and lows (bottom) for each July 22 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

27 of the last 31 days were warmer than the historical average for that date. Average difference: +0.9°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 — 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 — what a typical year looks like, from the full record.

Climate overview

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 year peaks in June, at 27.4°C over the day and around 28.5°C by mid-afternoon. At the other extreme, February averages 25.9°C, with typical overnight lows of 24.9°C.

The heavier rain months run from September to January. The yearly total for Miri comes to about 2418 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 ~2418 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 — a measured 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. Record high/low are the most extreme values in the ERA5 dataset (modelled since 1940), so they can differ from official weather-station readings.

MonthAvg highAvg lowRainDaylightRecord highRecord low
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 has 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 — 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

All-time high in 2016, all-time low in 2009: 31.1°C / 22.9°C.

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

Annual rainfall

~2418 mm/year on average. Last decade ran +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 — ~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).

Miri — Frequently asked questions

Which is the warmest month in Miri?
On long-term average, the warmest month in Miri is June (mean 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 2026-07-22, Miri is forecast to reach a high of 30.7°C and a low of 25.1°C. The long-term average for this date (the full record since 1940) is a high of 28.4°C and a low of 25.8°C — today's high is 2.3°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 2418 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°.
How many days a year does it rain in Miri?
On long-term average, Miri has about 292 days a year with measurable rain, totalling roughly 2418 mm.

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