Weather in Itoigawa

14-day forecast · updated today, Thursday, October 29, at 11:03 am (GMT+9)

Now · overcast 58 °F

Feels like: 55 °F
Low / high: 45 / 60 °F
Rain: 6%
Wind: 4 mph NNW

↘ 30.24 inHg · falling

Today in Itoigawa: overcast, 45 °F to 60 °F, with a 6% chance of rain and a light breeze from the north-northwest (4 mph). Tomorrow, light rain, 59 °F to 65 °F and a 97% chance of rain. The warmest day of the week is Friday 30, at 65 °F.

Temperatures for the next 14 days

60° 45°
Today
65° 59°
Fri 30
64° 54°
Sat 31
60° 54°
Sun 1
62° 60°
Mon 2
62° 56°
Tue 3
61° 53°
Wed 4
65° 56°
Thu 5
66° 53°
Fri 6
52° 49°
Sat 7
60° 49°
Sun 8
54° 46°
Mon 9
55° 45°
Tue 10
58° 48°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Overcast	45 / 60 °F	6%	7 mph S	5.5 ft	2:47 am · 6:12 pm	ECMWF
Fri 30	Light rain	59 / 65 °F	97% · 0.62 in	11 mph S	1.9 ft	3:27 am · 7:29 pm	ECMWF
Sat 31	Rain	54 / 64 °F	100% · 1.42 in	22 mph SW	3.5 ft	4:15 am	ECMWF
Sun 1	Light rain	54 / 60 °F	98% · 0.43 in	10 mph WNW	3.8 ft	5:13 am	ECMWF
Mon 2	Light rain	60 / 62 °F	85% · 0.61 in	16 mph SSW	2.6 ft	6:30 am · 11:17 pm	ECMWF
Tue 3	Light rain	56 / 62 °F	92% · 0.64 in	20 mph WSW	3.1 ft	8:09 am · 11:33 pm	ECMWF
Wed 4	Light drizzle	53 / 61 °F	45% · 0.02 in	10 mph E	2.9 ft	9:57 am · 11:49 pm	ECMWF
Thu 5	Overcast	56 / 65 °F	39%	9 mph SW	2.4 ft	11:28 am	ECMWF
Fri 6	Rain	53 / 66 °F	74% · 1.52 in	20 mph W	5.6 ft	12:07 am · 12:42 pm	ECMWF
Sat 7	Light rain	49 / 52 °F	84% · 0.61 in	8 mph NE	6.9 ft	12:26 am · 1:47 pm	ECMWF
Sun 8	Rain	49 / 60 °F	72% · 0.43 in	16 mph WSW	7.7 ft	12:45 am · 2:47 pm	ECMWF
Mon 9	Rain	46 / 54 °F	59% · 1.35 in	10 mph WNW	8.7 ft	1:04 am · 3:42 pm	ECMWF
Tue 10	Light rain	45 / 55 °F	59% · 1.09 in	21 mph WSW	8.4 ft	1:25 am · 4:32 pm	ECMWF
Wed 11	Light rain	48 / 58 °F	61% · 0.46 in	17 mph WSW	7.2 ft	1:49 am · 5:19 pm	ECMWF

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Partly cloudy	Partly cloudy	Partly cloudy	Clear sky	Overcast	Overcast	Overcast	Overcast
Temperature	49°	47°	45°	56°	59°	60°	59°	58°
Chance of rain	6%	0%	0%	0%	0%	0%	0%	0%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in
Wind (mph)	5 S	6 SSE	6 SE	3 N	4 NNW	3 W	3 SSE	4 S
Humidity	98%	97%	92%	55%	51%	57%	72%	82%
UV	0	0	0	2	4	1	0	0
Model	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF

Do the models agree?

Medium confidence

They broadly agree, but not quite on rain tomorrow: take it with some caution.

What 4 forecast models say for the next few days. The closer they are, the more reliable the forecast.

HighRainWind

Do the models agree? · High
High (°F)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	60°	65°	64°	60°	62°	62°	61°
AIFS	61°	63°	60°	59°	60°	58°	60°
GFS	63°	68°	63°	56°	58°	57°	61°
ICON	62°	65°	63°	58°	68°	59°	61°
Confidence	high	high	high	high	medium	high	high

Do the models agree? · Rain
Rain	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	0	0.62 in	1.42 in	0.43 in	0.61 in	0.64 in	0.02 in
AIFS	0	0.43 in	1.09 in	0.10 in	0.53 in	0.46 in	0.06 in
GFS	0	0.30 in	1.23 in	0.07 in	0.96 in	0.27 in	0
ICON	0	0.11 in	0.37 in	0.01 in	0.67 in	0.10 in	0.01 in
Confidence	high	medium	medium	medium	high	medium	medium

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	715	1118	2237	1015	1632	2030	1020
AIFS	5	6	13	7	8	7	6
GFS	98	1011	928	67	719	714	711
ICON	615	715	1437	616	1340	824	714
Confidence	high	high	medium	high	medium	medium	high

Chance of rain from the ensemble models

Model	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF (51 scenarios)	6%	97%	100%	98%	85%	92%	45%
GFS (GEFS, 31 scenarios)	0%	92%	100%	74%	97%	94%	19%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

Next few weeks, compared with normal: normal temperatures, normal rain and a slightly warmer sea.

Next 6 weeks

When	TemperatureTemp.	Rain	Sea	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	A bit below −0.9 °F	A bit above +37%	A bit above +1.6 °F	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal 0.0 °F	Normal	A bit above +1.6 °F	—
Nov 16 – Nov 22Nov 16–Nov 22	A bit above +1.3 °F	Normal	A bit above +1.6 °F	58° / 54°
Nov 23 – Nov 29Nov 23–Nov 29	A bit above +2.2 °F	Normal	A bit above +1.6 °F	57° / 52°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +2.3 °F	Normal	A bit above +1.4 °F	54° / 50°

Coming months

When	TemperatureTemp.	Rain	Sea
November	Above +2.9 °F	Normal	Above +1.8 °F
December	Above +2.7 °F	Normal	Above +2.0 °F
January	A bit above +2.3 °F	Normal	Above +1.8 °F
February	Above +3.1 °F	Normal	Above +2.0 °F
March	A bit above +2.5 °F	Normal	Above +1.8 °F

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give.

Itoigawa climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Itoigawa is from May to June: highs of 71 °F to 76 °F, about 11 rainy days a month and 5 hours of sunshine a day.

Typhoon season: in June and from August to September, peaking in September. In the last 30 years (1996–2025), 19 tropical cyclones passed within 93 mi of Itoigawa, about 6 every 10 years; 5 of them with hurricane-force winds (74 mph or more). The most recent: Nanmadol, in September 2022.

43° 30°

JanJ
43° 30°

FebF
50° 34°

MarM
62° 45°

AprA
71° 54°

MayM
76° 62°

JunJ
84° 70°

JulJ
87° 72°

AugA
79° 65°

SepS
69° 54°

OctO
59° 44°

NovN
49° 34°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	43°	30°	10.77 in	22	2.6	55°	4.7 ft	–
FebruaryFeb	43°	30°	6.67 in	17	3.7	51°	3.9 ft	–
MarchMar	50°	34°	5.43 in	14	4.7	50°	2.8 ft	–
AprilApr	62°	45°	3.93 in	11	5.3	52°	1.8 ft	–
MayMay	71°	54°	3.54 in	10	6.0	59°	1.2 ft	–
JuneJun	76°	62°	4.96 in	12	4.8	67°	1.1 ft	4
JulyJul	84°	70°	6.93 in	16	4.8	74°	0.9 ft	–
AugustAug	87°	72°	4.99 in	14	6.6	80°	1.1 ft	4
SeptemberSep	79°	65°	7.41 in	14	4.5	77°	1.6 ft	8
OctoberOct	69°	54°	7.03 in	14	4.0	71°	2.6 ft	3
NovemberNov	59°	44°	8.48 in	17	3.2	65°	3.2 ft	–
DecemberDec	49°	34°	11.88 in	22	2.3	60°	4.5 ft	–

Month	Water	Waves	Cyclones
Jan	55°	4.7 ft	–
Feb	51°	3.9 ft	–
Mar	50°	2.8 ft	–
Apr	52°	1.8 ft	–
May	59°	1.2 ft	–
Jun	67°	1.1 ft	4
Jul	74°	0.9 ft	–
Aug	80°	1.1 ft	4
Sep	77°	1.6 ft	8
Oct	71°	2.6 ft	3
Nov	65°	3.2 ft	–
Dec	60°	4.5 ft	–

Days: rainy days in the month. Sun: hours a day.

A normal year brings 82.02 in of rain on about 183 days and about 1,600 hours of sunshine.

Cyclones: how many tropical cyclones (tropical storms, hurricanes and typhoons) passed within 93 mi in each month from 1996 to 2025, according to IBTrACS (NOAA).

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now58 °Ffeels like 55 °F

Tomorrow59 / 65 °F

It's 58 °F now (feels like 55 °F). Today, 45 °F to 60 °F; tomorrow, 59 °F to 65 °F.

Chance of rain

Today 6%
Fri 30 97% 0.62 in
Sat 31 100% 1.42 in
Sun 1 98% 0.43 in
Mon 2 85% 0.61 in
Tue 3 92% 0.64 in
Wed 4 45% 0.02 in

Today the chance of rain reaches 6%. The next day with likely rain is Friday 30: 97% and 0.62 in.

Recent rain: last 24 hours, 0.10 in; last 3 days, 1.57 in; last 7 days, 4.53 in.

Humidity and dew point

Humidity50%

Dew point40 °F

Humidity is 50% now and the dew point is 40 °F.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now15 migood

Clouds84%

Visibility is good now (15 mi). No fog expected today.

The model gives visibility up to about 15 mi: beyond that, the horizon is clear.

UV index

Now4

Today's peak4moderate

Fri 30: 3 · Sat 31: 3 · Sun 1: 3

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

↗ Rising Anglers say fish bite less for a while
→ Steady Anglers expect normal activity
↘ Falling · now Anglers say fish feed more before the change

30.0030.2030.40 29.90

Falling now (−0.05 inHg in 3 hours). Over the next 48 hours: −0.29 inHg. Falling pressure: anglers say fish feed more before the change. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityFair · 32

Saharan dustNo

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

Day	Sky	Low / high	Rain	Max wind
Wed 28	Rain	50 / 60 °F	0.83 in	18 mph WNW
Tue 27	Light rain	60 / 72 °F	0.61 in	19 mph W
Mon 26	Drizzle	63 / 66 °F	0.32 in	13 mph ENE
Sun 25	Heavy rain	66 / 69 °F	1.66 in	8 mph E
Sat 24	Rain	65 / 68 °F	0.80 in	6 mph SSE
Fri 23	Overcast	52 / 66 °F	0	8 mph ENE
Thu 22	Rain	57 / 64 °F	1.55 in	13 mph NNE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Heavy rain	65 / 80 °F	2.54 in	18 mph WSW
Tue 20	Rain	65 / 69 °F	1.13 in	8 mph E
Mon 19	Rain	67 / 82 °F	0.55 in	12 mph SSW
Sun 18	Partly cloudy	56 / 75 °F	0	11 mph SE
Sat 17	Light drizzle	57 / 66 °F	0.02 in	9 mph ENE
Fri 16	Light rain	56 / 73 °F	0.24 in	12 mph WSW
Thu 15	Drizzle	59 / 69 °F	0.10 in	8 mph SW
Wed 14	Rain	63 / 73 °F	1.37 in	21 mph WSW
Tue 13	Clear sky	64 / 73 °F	0	6 mph S
Mon 12	Overcast	63 / 71 °F	0	8 mph E
Sun 11	Overcast	63 / 74 °F	0	8 mph E
Sat 10	Clear sky	64 / 75 °F	0	6 mph S
Fri 9	Mainly clear	59 / 73 °F	0	5 mph SE
Thu 8	Partly cloudy	58 / 69 °F	0	9 mph ESE
Wed 7	Light rain	62 / 69 °F	0.36 in	9 mph NNW
Tue 6	Rain	64 / 70 °F	0.91 in	9 mph N
Mon 5	Light drizzle	66 / 72 °F	0.02 in	6 mph W
Sun 4	Light drizzle	62 / 70 °F	0.02 in	9 mph ENE
Sat 3	Drizzle	62 / 68 °F	0.14 in	10 mph ENE
Fri 2	Light rain	64 / 72 °F	0.49 in	13 mph N
Thu 1	Rain	65 / 76 °F	0.44 in	10 mph W
Wed 30	Overcast	60 / 72 °F	0	7 mph E
Tue 29	Light rain	66 / 71 °F	0.67 in	8 mph NNE

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in ItoigawaQuestions

What's the weather like today in Itoigawa?

Overcast, from 45 °F to 60 °F, with a light breeze from the north-northwest (4 mph) and a 6% chance of rain.

Will it rain tomorrow in Itoigawa?

On Friday 30 the chance of rain is 97% (0.62 in): light rain.

How warm will it be this week?

Between a low of 45 °F and a high of 65 °F; the warmest day, Friday 30.

What's the UV index today?

It reaches 4 (moderate). Hat, sunglasses and sunscreen around midday.

Is the pressure rising or falling?

It's 30.24 inHg and falling: +0.04 inHg over the last 24 hours.

When is the best time to visit Itoigawa?

The best time to visit Itoigawa is from May to June: highs of 71 °F to 76 °F, about 11 rainy days a month and 5 hours of sunshine a day.

What is the weather like in Itoigawa in October?

In October, Itoigawa normally sees highs of 69 °F and lows of 54 °F, with about 14 rainy days (7.03 in for the month) and 4 hours of sunshine a day. The sea is around 71 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Itoigawa?

The warmest is August, with average highs of 87 °F, and the coldest February, with lows of 30 °F. The wettest is December (11.88 in) and the driest, May.

When is typhoon season in Itoigawa?

Typhoon season: in June and from August to September, peaking in September. In the last 30 years (1996–2025), 19 tropical cyclones passed within 93 mi of Itoigawa, about 6 every 10 years; 5 of them with hurricane-force winds (74 mph or more). The most recent: Nanmadol, in September 2022.

More about Itoigawa today

Weather near Itoigawa

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 6.0 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 11:03 am (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from