Weather in Iwakuni

14-day forecast · updated today, Thursday, October 29, at 4:08 pm (GMT+9)

Now · overcast 67 °F

Feels like: 68 °F
Low / high: 53 / 67 °F
Rain: 100% · 0.15 in
Wind: 3 mph S

↘ 30.17 inHg · falling

Today in Iwakuni: heavy drizzle, 53 °F to 67 °F, with a 100% chance of rain (0.15 in) and a light air from the south (3 mph). Tomorrow, light rain, 58 °F to 73 °F and a 100% chance of rain. The warmest day of the week is Monday 2, at 73 °F.

Temperatures for the next 14 days

67° 53°
Today
73° 58°
Fri 30
72° 53°
Sat 31
64° 50°
Sun 1
73° 58°
Mon 2
68° 52°
Tue 3
62° 55°
Wed 4
69° 57°
Thu 5
65° 52°
Fri 6
61° 51°
Sat 7
66° 53°
Sun 8
61° 47°
Mon 9
62° 46°
Tue 10
65° 47°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Heavy drizzle	53 / 67 °F	100% · 0.15 in	6 mph NNE	0.7 ft	11:42 am · 11:19 pm	ECMWF
Fri 30	Light rain	58 / 73 °F	100% · 0.43 in	12 mph W	0.7 ft	12:30 pm · 12:00 am	ECMWF
Sat 31	Mainly clear	53 / 72 °F	0%	13 mph WNW	0.9 ft	1:26 pm	ECMWF
Sun 1	Overcast	50 / 64 °F	6%	4 mph N	0.1 ft	12:49 am · 2:36 pm	ECMWF
Mon 2	Light rain	58 / 73 °F	90% · 0.39 in	15 mph W	1.7 ft	2:00 am · 4:00 pm	ECMWF
Tue 3	Overcast	52 / 68 °F	0%	8 mph N	0.8 ft	3:48 am · 5:19 pm	ECMWF
Wed 4	Overcast	55 / 62 °F	9%	10 mph NNE	1.4 ft	5:33 am · 6:19 pm	ECMWF
Thu 5	Overcast	57 / 69 °F	23%	8 mph NNW	0.9 ft	6:44 am · 7:06 pm	ECMWF
Fri 6	Mainly clear	52 / 65 °F	18%	9 mph NNW	0.9 ft	7:37 am · 7:45 pm	ECMWF
Sat 7	Overcast	51 / 61 °F	9%	12 mph NE	2.0 ft	8:20 am · 8:20 pm	ECMWF
Sun 8	Overcast	53 / 66 °F	9%	8 mph NNW	1.8 ft	8:59 am · 8:51 pm	ECMWF
Mon 9	Partly cloudy	47 / 61 °F	12%	11 mph N	2.0 ft	9:36 am · 9:21 pm	ECMWF
Tue 10	Mainly clear	46 / 62 °F	14%	9 mph W	0.8 ft	10:11 am · 9:49 pm	ECMWF
Wed 11	Overcast	47 / 65 °F	8%	7 mph W	0.9 ft	10:46 am · 10:17 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	Clear	Clear	Mainly clear	Partly cloudy	Partly cloudy	Partly cloudy	Overcast	Drizzle
Temperature	53°	53°	54°	60°	66°	67°	66°	64°
Chance of rain	0%	0%	0%	0%	0%	0%	4%	92%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.02 in
Wind (mph)	5 N	6 N	4 N	4 NNE	5 SSE	4 SE	7 SW	2 ESE
Humidity	66%	62%	69%	74%	70%	74%	70%	82%
UV	0	0	0	2	5	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 today: 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	67°	73°	72°	64°	73°	68°	62°
AIFS	69°	69°	72°	68°	70°	69°	61°
GFS	68°	70°	69°	64°	67°	64°	65°
ICON	68°	70°	69°	67°	68°	68°	65°
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	0.15 in	0.43 in	0	0	0.39 in	0	0
AIFS	0.13 in	0.67 in	0	0.02 in	0.62 in	0	0.02 in
GFS	0.06 in	0.12 in	0	0	0.39 in	0	0
ICON	0.01 in	0.39 in	0	0	0.05 in	0	0
Confidence	medium	medium	high	high	medium	high	high

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	614	1226	1328	419	1526	816	1024
AIFS	5	6	8	3	6	7	6
GFS	713	1117	1318	55	1530	615	1214
ICON	413	919	1020	49	49	816	1020
Confidence	high	high	high	high	medium	high	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)	100%	100%	0%	6%	90%	0%	9%
GFS (GEFS, 31 scenarios)	100%	100%	0%	4%	98%	3%	3%

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.

The next few weeks look normal for the time of year.

Next 6 weeks

When	TemperatureTemp.	Rain	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	Normal −0.2 °F	A bit below −35%	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal +0.2 °F	Normal	—
Nov 16 – Nov 22Nov 16–Nov 22	A bit above +1.1 °F	Normal	60° / 49°
Nov 23 – Nov 29Nov 23–Nov 29	A bit above +2.2 °F	A bit above +33%	58° / 47°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +2.3 °F	A bit above +45%	56° / 45°

Coming months

When	TemperatureTemp.	Rain
November	A bit above +2.2 °F	A bit above +37%
December	A bit above +1.8 °F	Above +57%
January	A bit above +1.8 °F	A bit above +24%
February	Above +2.9 °F	A bit above +25%
March	A bit above +2.2 °F	A bit above +24%

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. The long-range sea temperature isn't usable at this spot (the model's grid cell falls on land).

Iwakuni climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Iwakuni is in October and in May: highs of 73 °F, about 8 rainy days a month and 6 hours of sunshine a day.

Typhoon season: from July to September, peaking in September. In the last 30 years (1996–2025), 28 tropical cyclones passed within 93 mi of Iwakuni, about 9 every 10 years; 9 of them with hurricane-force winds (74 mph or more). The most recent: Peipah, in September 2025.

49° 35°

JanJ
50° 36°

FebF
56° 41°

MarM
65° 49°

AprA
73° 58°

MayM
78° 66°

JunJ
85° 74°

JulJ
87° 76°

AugA
81° 69°

SepS
73° 58°

OctO
63° 48°

NovN
53° 38°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves	Cyclones
JanuaryJan	49°	35°	2.26 in	7	4.1	58°	2.3 ft	–
FebruaryFeb	50°	36°	2.86 in	7	4.4	55°	2.0 ft	–
MarchMar	56°	41°	5.17 in	10	5.1	56°	1.7 ft	–
AprilApr	65°	49°	6.49 in	10	5.6	58°	1.6 ft	–
MayMay	73°	58°	6.99 in	9	5.9	63°	1.2 ft	1
JuneJun	78°	66°	10.07 in	13	4.3	69°	1.2 ft	1
JulyJul	85°	74°	10.25 in	13	5.2	76°	1.3 ft	5
AugustAug	87°	76°	5.52 in	11	6.4	79°	1.3 ft	7
SeptemberSep	81°	69°	7.03 in	11	5.1	77°	1.4 ft	13
OctoberOct	73°	58°	5.14 in	7	5.2	74°	1.7 ft	1
NovemberNov	63°	48°	3.22 in	7	4.4	68°	1.8 ft	–
DecemberDec	53°	38°	2.34 in	7	4.0	63°	2.4 ft	–

Month	Water	Waves	Cyclones
Jan	58°	2.3 ft	–
Feb	55°	2.0 ft	–
Mar	56°	1.7 ft	–
Apr	58°	1.6 ft	–
May	63°	1.2 ft	1
Jun	69°	1.2 ft	1
Jul	76°	1.3 ft	5
Aug	79°	1.3 ft	7
Sep	77°	1.4 ft	13
Oct	74°	1.7 ft	1
Nov	68°	1.8 ft	–
Dec	63°	2.4 ft	–

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

A normal year brings 67.33 in of rain on about 110 days and about 1,800 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

Now67 °Ffeels like 68 °F

Tomorrow58 / 73 °F

It's 67 °F now (feels like 68 °F). Today, 53 °F to 67 °F; tomorrow, 58 °F to 73 °F.

Chance of rain

Today 100% 0.15 in
Fri 30 100% 0.43 in
Sat 31 0%
Sun 1 6%
Mon 2 90% 0.39 in
Tue 3 0%
Wed 4 9%

Today the chance of rain reaches 100%, with 0.15 in in total. The next day with likely rain is Friday 30: 100% and 0.43 in.

Recent rain: last 24 hours, 0.00 in; last 3 days, 0.00 in; last 7 days, 3.86 in.

Humidity and dew point

Humidity73%

Dew point58 °F

Humidity is 73% now and the dew point is 58 °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

Clouds90%

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

Now0

Today's peak5moderate

Fri 30: 4 · Sat 31: 4 · 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

30.0030.20 29.95

Falling now (−0.04 inHg in 3 hours). Over the next 48 hours: −0.07 inHg. Falling pressure: anglers say fish feed more before the change. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityModerate · 43

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	Mainly clear	54 / 68 °F	0	8 mph N
Tue 27	Partly cloudy	58 / 75 °F	0	12 mph NW
Mon 26	Heavy rain	65 / 71 °F	2.30 in	15 mph NNE
Sun 25	Light rain	70 / 74 °F	0.28 in	14 mph N
Sat 24	Rain	64 / 73 °F	0.91 in	9 mph NE
Fri 23	Rain	61 / 71 °F	0.37 in	12 mph NE
Thu 22	Overcast	61 / 73 °F	0	13 mph NNE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Drizzle	65 / 80 °F	0.12 in	14 mph WSW
Tue 20	Light drizzle	72 / 81 °F	0.01 in	8 mph SSW
Mon 19	Light drizzle	72 / 77 °F	0.12 in	10 mph SSW
Sun 18	Overcast	62 / 74 °F	0	11 mph ENE
Sat 17	Overcast	60 / 76 °F	0	9 mph NE
Fri 16	Overcast	59 / 72 °F	0	6 mph N
Thu 15	Overcast	58 / 71 °F	0	7 mph N
Wed 14	Light rain	61 / 74 °F	0.11 in	11 mph NW
Tue 13	Light rain	67 / 78 °F	0.28 in	9 mph SSW
Mon 12	Overcast	67 / 77 °F	0	6 mph NNE
Sun 11	Overcast	67 / 78 °F	0	6 mph NNE
Sat 10	Mainly clear	66 / 78 °F	0	5 mph NE
Fri 9	Clear sky	63 / 79 °F	0	6 mph NNE
Thu 8	Clear sky	59 / 75 °F	0	9 mph NNE
Wed 7	Light drizzle	61 / 76 °F	0.01 in	11 mph NNE
Tue 6	Overcast	61 / 77 °F	0	11 mph N
Mon 5	Drizzle	65 / 73 °F	0.24 in	8 mph ENE
Sun 4	Drizzle	64 / 70 °F	0.24 in	9 mph NE
Sat 3	Overcast	64 / 75 °F	0	12 mph NE
Fri 2	Partly cloudy	65 / 78 °F	0	12 mph NNE
Thu 1	Mainly clear	63 / 80 °F	0	7 mph N
Wed 30	Clear sky	64 / 76 °F	0	8 mph NNE
Tue 29	Light rain	69 / 73 °F	0.33 in	8 mph NE

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 IwakuniQuestions

What's the weather like today in Iwakuni?

Heavy drizzle, from 53 °F to 67 °F, with a light air from the south (3 mph) and a 100% chance of rain.

Will it rain tomorrow in Iwakuni?

On Friday 30 the chance of rain is 100% (0.43 in): light rain.

How warm will it be this week?

Between a low of 50 °F and a high of 73 °F; the warmest day, Monday 2.

What's the UV index today?

It reaches 5 (moderate). Hat, sunglasses and sunscreen around midday.

Is the pressure rising or falling?

It's 30.17 inHg and falling: −0.01 inHg over the last 24 hours.

When is the best time to visit Iwakuni?

The best time to visit Iwakuni is in October and in May: highs of 73 °F, about 8 rainy days a month and 6 hours of sunshine a day.

What is the weather like in Iwakuni in October?

In October, Iwakuni normally sees highs of 73 °F and lows of 58 °F, with about 7 rainy days (5.14 in for the month) and 5 hours of sunshine a day. The sea is around 74 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Iwakuni?

The warmest is August, with average highs of 87 °F, and the coldest January, with lows of 35 °F. The wettest is July (10.25 in) and the driest, January.

When is typhoon season in Iwakuni?

Typhoon season: from July to September, peaking in September. In the last 30 years (1996–2025), 28 tropical cyclones passed within 93 mi of Iwakuni, about 9 every 10 years; 9 of them with hurricane-force winds (74 mph or more). The most recent: Peipah, in September 2025.

More about Iwakuni today

Weather near Iwakuni

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 6.3 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 4:08 pm (local time).

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