Matsumoto weather by month: averages, rainfall & climate trends
Seasons run to extremes in Matsumoto: monthly means span 26.2°C between the coldest month and the warmest. Rainfall leans toward the stretch from June to October. Matsumoto weather by month: average temperatures, rainfall, extremes and how the climate has changed since 1940.
Today vs average
+2.6°Chigh above average
How it's changed
+3.4°Caverage temperature, 2016–2025 vs 1940–1949average temperature vs 1940–4962frost days a year now (2016–2025) · 117 in the 1940sfrost days a year · 117 in the 1940s47days above 30°C a year now (2016–2025) · 4 in the 1940sdays above 30°C · 4 in the 1940s+3.4°C vs the 1940s · see how it's changed →Weather by montha typical year, averaged over the full recordJanuary, rain 105 mmhigh 3°low −6°February, rain 105 mmhigh 5°low −4°March, rain 142 mmhigh 9°low 0°April, rain 144 mmhigh 16°low 6°May, rain 166 mmhigh 21°low 11°June, rain 260 mmhigh 24°low 16°July, rain 271 mmhigh 28°low 20°August, rain 184 mmhigh 29°low 21°September, rain 232 mmhigh 25°low 17°October, rain 180 mmhigh 19°low 10°November, rain 117 mmhigh 13°low 4°December, rain 105 mmhigh 7°low −2°wettest month July, 271 mm · 2,009 mm a yearsee month by month →Right now
What it's doing today vs the historical average for this date.
Right now
11.2°
21°7°
19°15°22°17°20°16°21°15°14°3°17°2°On this date: October 22
High above average · +2.6°C
- Highest since 1940: 24.9° · 1976
- Lowest since 1940: 3.4° · 1957
- One year ago: 12° / 6°
Every October 22 in history, coldest to hottest
Dots show daily highs (top) and lows (bottom) for each October 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 Matsumoto is sampled from the ECMWF ERA5 reanalysis at 36.23°N, 137.97°E, with daily records since 1940.
- Coordinates
- 36.23°N, 137.97°E
- Time zone
- Asia/Tokyo
- Period
- 1940–2026
- Data source
- ERA5 (ECMWF)
Last 30 days
21 of the last 31 days were warmer than the historical average for that date. Average difference: +1.6°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 warmest month is August, with typical afternoon highs of 29.2°C and nights around 20.8°C. In a typical recent year, around 45 days reach 30°C or more. The coolest month is January, when afternoons reach about 3.4°C and overnight lows sit around −5.7°C.
In total, Matsumoto averages about 2,009 mm of precipitation a year; July is usually the wettest month (271 mm) and December the driest (105 mm). Precipitation falls on roughly 164 days in a typical year.
Over the full record (since 1940), the annual mean temperature in Matsumoto has risen by 3.4°C between its first decade and its last. Where the first decade averaged 115 frost days a year, the recent one saw about 60.
Climate graph (climograph)
August is the warmest month, January the coolest: a yearly swing of 26°C. Wettest month: July (~271 mm). Whole year averages ~2,009 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).
Rainy days by month
About 164 rainy days a year: most in July (~18), fewest in February (~11).
Bars = average number of days with ≥ 2 mm per month. Hover for the monthly rainfall total.
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.
Matsumoto 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.
| Month | Avg high | Avg low | Rain | Rainy days | Daylight | Highest | Lowest |
|---|---|---|---|---|---|---|---|
| January | 3.4° | −5.7° | 105 mm | 13 | 9.8 h | 13.9° (2020) | −19.1° (1942) |
| February | 4.6° | −4.2° | 105 mm | 11 | 10.7 h | 18.6° (2021) | −17.8° (1942) |
| March | 8.8° | −0.1° | 142 mm | 13 | 11.7 h | 23.5° (2025) | −15.0° (1941) |
| April | 16.0° | 5.7° | 144 mm | 12 | 12.9 h | 29.1° (1998) | −8.4° (1941) |
| May | 21.4° | 11.3° | 166 mm | 13 | 13.9 h | 32.5° (2019) | −0.1° (1965) |
| June | 24.4° | 16.3° | 260 mm | 18 | 14.5 h | 34.4° (2022) | 6.2° (1952) |
| July | 28.1° | 20.3° | 271 mm | 18 | 14.2 h | 35.4° (2018) | 11.2° (1949) |
| August | 29.2° | 20.8° | 184 mm | 15 | 13.4 h | 36.4° (2018) | 10.3° (1956) |
| September | 25.1° | 17.0° | 232 mm | 16 | 12.2 h | 35.4° (2023) | 3.8° (1960) |
| October | 19.2° | 10.1° | 180 mm | 13 | 11.1 h | 29.6° (2024) | −0.8° (1972) |
| November | 13.3° | 3.9° | 117 mm | 11 | 10.0 h | 25.0° (2023) | −11.0° (1956) |
| December | 6.5° | −2.5° | 105 mm | 12 | 9.5 h | 19.4° (2018) | −16.4° (1947) |
How it's changed
Year-by-year signals from 1940 to today.Climate stripes
Annual mean shifted from 1940–1949 to 2016–2025 by +3.4°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: +0.37°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
Dec–Feb is warming fastest: +0.52°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: 4.3 early in the record → 46.7 recently. Frost days: 117 → 62.
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 2018, coldest in 1942: 36.4°C / −19.1°C.
One point per year: the single hottest and coldest day recorded that year.
Annual rainfall
~2,009 mm/year on average. Last decade: +1% vs that average. Long-term trend: +18 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).