Ōmachi weather in October
In October, Ōmachi sees average daytime highs of 13°C and overnight lows near 5°C, with 227 mm of precipitation across 16.3 wet days and about 11.1 hours of daylight. It is the 6th-warmest and 6th-wettest month of the year here.
Highs ease over the month, from about 16°C in the first days to 10°C by the end. The sky is clear or mostly clear about 22% of the time in October, and the air most often feels dry.
Daylight stretches from about 11 h 36 min at the start of October to 10 h 30 min by month's end. Set against the rest of the year, October is Ōmachi's 3rd-clearest and 8th-windiest month. For the whole year in context, see Ōmachi's year-round climate.
- Daytime high
- 13°
- 6th warmest
- Overnight low
- 5°
- 7th coldest
- Precipitation
- 227 mm
- 16.3 wet days
- Daylight
- 11 h 06 min
- 6:02 AM – 5:05 PM
- Cloud cover
- 66%
- 3rd clearest
- Wind
- 5 km/h
- 8th windiest
- Solar energy
- 3.3 kWh/m²
- Travel score
- 3.2
- out of 10
Ōmachi is dissolved municipality in Kitaazumi district, Nagano prefecture, Japan.
- Founded
- 1889
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in October
Highs ease over the month, from about 16°C in the first days to 10°C by the end.
A typical October day in Ōmachi reaches about 13°C in the afternoon and slips back to 5°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 17°C. Set against its neighbours, October runs about 6°C cooler than September and about 7°C warmer than November.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 |
| Avg low (°C) | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 16 | 9 |
| 2 | 16 | 9 |
| 3 | 16 | 8 |
| 4 | 16 | 8 |
| 5 | 16 | 8 |
| 6 | 15 | 8 |
| 7 | 15 | 8 |
| 8 | 15 | 7 |
| 9 | 15 | 7 |
| 10 | 15 | 7 |
| 11 | 14 | 7 |
| 12 | 14 | 6 |
| 13 | 14 | 6 |
| 14 | 14 | 6 |
| 15 | 14 | 6 |
| 16 | 13 | 5 |
| 17 | 13 | 5 |
| 18 | 13 | 5 |
| 19 | 13 | 5 |
| 20 | 13 | 4 |
| 21 | 12 | 4 |
| 22 | 12 | 4 |
| 23 | 12 | 4 |
| 24 | 12 | 3 |
| 25 | 11 | 3 |
| 26 | 11 | 3 |
| 27 | 11 | 3 |
| 28 | 11 | 2 |
| 29 | 10 | 2 |
| 30 | 10 | 2 |
| 31 | 10 | 2 |
How October really feels in Ōmachi
Once humidity and wind are folded in, October averages 0 days that feel above 32°C and 1 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in October is cold — wind chill drags the overnight "feels like" below the raw low.
Ōmachi weather by month
How October compares with the rest of the year at a glance. October is the 6th-warmest and 6th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -5° / -11° | 193 | 22.4 | 24 | 9.8 | 0.0 |
| Feb | -3° / -10° | 167 | 18.3 | 19.6 | 10.6 | 0.0 |
| Mar | 1° / -6° | 211 | 19 | 19.1 | 11.7 | 0.0 |
| Apr | 7° / -1° | 200 | 16.6 | 9.9 | 12.9 | 0.9 |
| May | 14° / 6° | 237 | 17.8 | 1.3 | 13.9 | 3.5 |
| Jun | 18° / 11° | 344 | 20.6 | 0 | 14.4 | 4.1 |
| Jul | 22° / 15° | 451 | 24.4 | 0 | 14.2 | 4.3 |
| Aug | 23° / 16° | 297 | 21.9 | 0 | 13.4 | 4.9 |
| Sep | 19° / 12° | 292 | 19.1 | 0 | 12.2 | 4.6 |
| Oct | 13° / 5° | 227 | 16.3 | 1.1 | 11.1 | 3.2 |
| Nov | 6° / -2° | 183 | 17.3 | 11.1 | 10.1 | 0.6 |
| Dec | -2° / -8° | 196 | 21.4 | 21.4 | 9.6 | 0.0 |
Cloud cover in October
The sky is clear or mostly clear about 22% of the time in October.
Beyond those clear spells, partly cloudy skies cover about 16% of October, with mostly cloudy or overcast conditions the remaining 62%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 29 | 30 | 30 | 31 | 31 | 32 | 33 | 34 | 33 | 35 | 36 | 37 | 37 | 38 | 39 | 39 | 40 | 40 | 40 | 40 | 40 | 41 | 42 | 42 | 42 | 42 | 44 | 44 | 44 | 44 | 45 |
| Cloudier (%) | 71 | 70 | 70 | 69 | 69 | 68 | 67 | 66 | 67 | 65 | 64 | 63 | 63 | 62 | 61 | 61 | 60 | 60 | 60 | 60 | 60 | 59 | 58 | 58 | 58 | 58 | 56 | 56 | 56 | 56 | 55 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 29 | 71 |
| 2 | 30 | 70 |
| 3 | 30 | 70 |
| 4 | 31 | 69 |
| 5 | 31 | 69 |
| 6 | 32 | 68 |
| 7 | 33 | 67 |
| 8 | 34 | 66 |
| 9 | 33 | 67 |
| 10 | 35 | 65 |
| 11 | 36 | 64 |
| 12 | 37 | 63 |
| 13 | 37 | 63 |
| 14 | 38 | 62 |
| 15 | 39 | 61 |
| 16 | 39 | 61 |
| 17 | 40 | 60 |
| 18 | 40 | 60 |
| 19 | 40 | 60 |
| 20 | 40 | 60 |
| 21 | 40 | 60 |
| 22 | 41 | 59 |
| 23 | 42 | 58 |
| 24 | 42 | 58 |
| 25 | 42 | 58 |
| 26 | 42 | 58 |
| 27 | 44 | 56 |
| 28 | 44 | 56 |
| 29 | 44 | 56 |
| 30 | 44 | 56 |
| 31 | 45 | 55 |
Chance of precipitation in October
Ōmachi gets around 227 mm of rain and snow over 16.3 wet days in October. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 52% and peaks near 58% on the wettest days, and about 1 day brings snow. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 58 | 58 | 57 | 57 | 57 | 56 | 56 | 56 | 55 | 55 | 54 | 53 | 52 | 51 | 51 | 50 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 50 | 50 | 50 | 50 | 50 | 50 |
| Snow chance (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 14 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 58 | 0 |
| 2 | 58 | 0 |
| 3 | 57 | 0 |
| 4 | 57 | 0 |
| 5 | 57 | 0 |
| 6 | 56 | 0 |
| 7 | 56 | 0 |
| 8 | 56 | 1 |
| 9 | 55 | 1 |
| 10 | 55 | 1 |
| 11 | 54 | 1 |
| 12 | 53 | 1 |
| 13 | 52 | 1 |
| 14 | 51 | 1 |
| 15 | 51 | 2 |
| 16 | 50 | 2 |
| 17 | 49 | 3 |
| 18 | 49 | 3 |
| 19 | 49 | 4 |
| 20 | 49 | 4 |
| 21 | 49 | 5 |
| 22 | 49 | 6 |
| 23 | 49 | 7 |
| 24 | 49 | 8 |
| 25 | 49 | 9 |
| 26 | 50 | 10 |
| 27 | 50 | 11 |
| 28 | 50 | 12 |
| 29 | 50 | 13 |
| 30 | 50 | 14 |
| 31 | 50 | 14 |
Humidity in October
Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, October lands in the dry band about 96% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 94 | 95 | 95 | 96 | 96 | 97 | 97 | 97 | 98 | 98 | 98 | 98 | 99 | 99 | 99 | 99 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Comfortable (%) | 11 | 10 | 9 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Humid (%) | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| 1 | 88 | 11 | 1 |
| 2 | 89 | 10 | 1 |
| 3 | 90 | 9 | 1 |
| 4 | 91 | 8 | 1 |
| 5 | 92 | 7 | 1 |
| 6 | 93 | 7 | 0 |
| 7 | 94 | 6 | 0 |
| 8 | 94 | 6 | 0 |
| 9 | 95 | 5 | 0 |
| 10 | 95 | 5 | 0 |
| 11 | 96 | 4 | 0 |
| 12 | 96 | 4 | 0 |
| 13 | 97 | 3 | 0 |
| 14 | 97 | 3 | 0 |
| 15 | 97 | 3 | 0 |
| 16 | 98 | 2 | 0 |
| 17 | 98 | 2 | 0 |
| 18 | 98 | 2 | 0 |
| 19 | 98 | 2 | 0 |
| 20 | 99 | 1 | 0 |
| 21 | 99 | 1 | 0 |
| 22 | 99 | 1 | 0 |
| 23 | 99 | 1 | 0 |
| 24 | 100 | 0 | 0 |
| 25 | 100 | 0 | 0 |
| 26 | 100 | 0 | 0 |
| 27 | 100 | 0 | 0 |
| 28 | 100 | 0 | 0 |
| 29 | 100 | 0 | 0 |
| 30 | 100 | 0 | 0 |
| 31 | 100 | 0 | 0 |
Wind in October
Winds average 5 km/h in October.
Across October, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
| 31 | 5 | calm |
Sunrise & sunset in October
Daylight runs from about 11 h 36 min at the start of October to 10 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 66 minutes over October. Sunrise moves from 5:49 AM to 6:17 AM, and sunset from 5:26 PM to 4:47 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.6 | 11.6 | 11.6 | 11.5 | 11.5 | 11.4 | 11.4 | 11.4 | 11.3 | 11.3 | 11.2 | 11.2 | 11.2 | 11.1 | 11.1 | 11.1 | 11.0 | 11.0 | 10.9 | 10.9 | 10.9 | 10.8 | 10.8 | 10.8 | 10.7 | 10.7 | 10.6 | 10.6 | 10.6 | 10.5 | 10.5 |
| Sunrise (AM) | 5:49 | 5:49 | 5:50 | 5:51 | 5:52 | 5:53 | 5:54 | 5:55 | 5:56 | 5:56 | 5:57 | 5:58 | 5:59 | 6:00 | 6:01 | 6:02 | 6:03 | 6:04 | 6:05 | 6:06 | 6:07 | 6:08 | 6:09 | 6:10 | 6:11 | 6:12 | 6:13 | 6:14 | 6:15 | 6:16 | 6:17 |
| Sunset (PM) | 5:26 | 5:25 | 5:23 | 5:22 | 5:21 | 5:19 | 5:18 | 5:16 | 5:15 | 5:13 | 5:12 | 5:11 | 5:09 | 5:08 | 5:06 | 5:05 | 5:04 | 5:02 | 5:01 | 5:00 | 4:59 | 4:57 | 4:56 | 4:55 | 4:54 | 4:53 | 4:52 | 4:51 | 4:50 | 4:48 | 4:47 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.6 | 5:49 | 5:26 |
| 2 | 11.6 | 5:49 | 5:25 |
| 3 | 11.6 | 5:50 | 5:23 |
| 4 | 11.5 | 5:51 | 5:22 |
| 5 | 11.5 | 5:52 | 5:21 |
| 6 | 11.4 | 5:53 | 5:19 |
| 7 | 11.4 | 5:54 | 5:18 |
| 8 | 11.4 | 5:55 | 5:16 |
| 9 | 11.3 | 5:56 | 5:15 |
| 10 | 11.3 | 5:56 | 5:13 |
| 11 | 11.2 | 5:57 | 5:12 |
| 12 | 11.2 | 5:58 | 5:11 |
| 13 | 11.2 | 5:59 | 5:09 |
| 14 | 11.1 | 6:00 | 5:08 |
| 15 | 11.1 | 6:01 | 5:06 |
| 16 | 11.1 | 6:02 | 5:05 |
| 17 | 11.0 | 6:03 | 5:04 |
| 18 | 11.0 | 6:04 | 5:02 |
| 19 | 10.9 | 6:05 | 5:01 |
| 20 | 10.9 | 6:06 | 5:00 |
| 21 | 10.9 | 6:07 | 4:59 |
| 22 | 10.8 | 6:08 | 4:57 |
| 23 | 10.8 | 6:09 | 4:56 |
| 24 | 10.8 | 6:10 | 4:55 |
| 25 | 10.7 | 6:11 | 4:54 |
| 26 | 10.7 | 6:12 | 4:53 |
| 27 | 10.6 | 6:13 | 4:52 |
| 28 | 10.6 | 6:14 | 4:51 |
| 29 | 10.6 | 6:15 | 4:50 |
| 30 | 10.5 | 6:16 | 4:48 |
| 31 | 10.5 | 6:17 | 4:47 |
Solar energy in October
Average shortwave solar energy reaching the ground each day in October, about 3.3 kWh/m².
For context, solar energy here swings from a low near 2.39 kWh/m² to a high of 5.74 kWh/m² in May across the year — October's 3.3 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.6 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.2 | 3.2 | 3.2 | 3.2 | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.0 | 3.0 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.6 | Moderate |
| 2 | 3.5 | Moderate |
| 3 | 3.5 | Moderate |
| 4 | 3.5 | Moderate |
| 5 | 3.5 | Moderate |
| 6 | 3.5 | Moderate |
| 7 | 3.5 | Moderate |
| 8 | 3.4 | Moderate |
| 9 | 3.4 | Moderate |
| 10 | 3.4 | Moderate |
| 11 | 3.4 | Moderate |
| 12 | 3.4 | Moderate |
| 13 | 3.4 | Moderate |
| 14 | 3.4 | Moderate |
| 15 | 3.4 | Moderate |
| 16 | 3.3 | Moderate |
| 17 | 3.3 | Moderate |
| 18 | 3.3 | Moderate |
| 19 | 3.3 | Moderate |
| 20 | 3.3 | Moderate |
| 21 | 3.2 | Moderate |
| 22 | 3.2 | Moderate |
| 23 | 3.2 | Moderate |
| 24 | 3.2 | Moderate |
| 25 | 3.1 | Moderate |
| 26 | 3.1 | Moderate |
| 27 | 3.1 | Moderate |
| 28 | 3.1 | Moderate |
| 29 | 3.1 | Moderate |
| 30 | 3.0 | Moderate |
| 31 | 3.0 | Moderate |
Hazard calendar for Ōmachi
In October, Ōmachi sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Ōmachi sits in the Pacific typhoon belt; the season peaks July–October.
Is October a good time to visit Ōmachi?
Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
October is a weaker month for outdoor sightseeing in Ōmachi.
What to pack for Ōmachi in October
From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In October, Ōmachi sees daytime highs around 13°C and nights near 5°C. Pack rain gear. Worth having: a warm layer. About 16 days see rain.
Sea temperature near Ōmachi in October
The nearest coast averages about 22°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 61 km away) is warmest in August at about 27°C and coldest in March near 10°C.
It's comfortable for a long swim from Jun 18 to Nov 3 — about 4.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 13 | 11 | 10 | 11 | 15 | 20 | 24 | 27 | 25 | 22 | 19 | 16 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Warm | Warm | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 13 | Bracing |
| Feb | 11 | Bracing |
| Mar | 10 | Bracing |
| Apr | 11 | Bracing |
| May | 15 | Cool |
| Jun | 20 | Cool |
| Jul | 24 | Refreshing |
| Aug | 27 | Warm |
| Sep | 25 | Warm |
| Oct | 22 | Refreshing |
| Nov | 19 | Cool |
| Dec | 16 | Cool |
UV index in Ōmachi in October
Clear-sky midday UV in October peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ōmachi peaks around July 20 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 5 | 6 | 7 | 9 | 10 | 10 | 10 | 9 | 6 | 3 | 2 |
| Level | Moderate | Moderate | High | Very high | Very high | Very high | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 5 | Moderate |
| Mar | 6 | High |
| Apr | 7 | Very high |
| May | 9 | Very high |
| Jun | 10 | Very high |
| Jul | 10 | Extreme |
| Aug | 10 | Extreme |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Ōmachi in October
Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.
Air quality in Ōmachi is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 14 | 20 | 21 | 20 | 18 | 15 | 13 | 12 | 11 | 11 | 10 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 14 | Moderate |
| Mar | 20 | Moderate |
| Apr | 21 | Moderate |
| May | 20 | Moderate |
| Jun | 18 | Moderate |
| Jul | 15 | Moderate |
| Aug | 13 | Moderate |
| Sep | 12 | Good |
| Oct | 11 | Good |
| Nov | 11 | Good |
| Dec | 10 | Good |
Where is Ōmachi?
Ōmachi sits at 36.5°N, 137.9°E, 714 m above sea level, in Japan. The nearest listed city is Hotaka, 18 km away.
Topography around Ōmachi
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ōmachi.
Within 3 km, the terrain around Ōmachi has significant variations in elevation — a maximum elevation change of 486 m around an average of 823 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,371 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,120 m.
The land around Ōmachi is covered by trees (50%) and artificial surfaces (26%) within 3 km, trees (83%) within 16 km, and trees (75%) within 80 km.
Japan travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 100 V · 50 / 60 Hz
- Prices
- ≈ 65% of US
- price level, 2025
- GDP per capita
- $35,951
- 2025
- Happiness
- 6.1 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.2
- per 100k, 2023
- Road deaths
- 3.6
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very low
- EF EPI 446
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ōmachi (36.5°, 137.8667°, elevation 714 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).