Onna weather and climate in 2025
January
February
March
April
May
June
July
August
September
October
November
December
Overview
January
February
March
April
May
June
July
August
September
October
November
December
Overview
Onna weather and climate in 2025
January
February
March
April
May
June
July
August
September
October
November
December
Overview
January
February
March
April
May
June
July
August
September
October
November
December
Overview
Day
31 °C
Night
26 °C
Sea
29 °C
Precipitation
220 mm
in month
Rainy days
15 days
in month
Daylight
13 hours
average
Sunshine
7 hours
average
Humidity
82 %
Day
31 °C
Night
26 °C
Sea
29 °C
Precipitation
220 mm
in month
Rainy days
15 days
in month
Daylight
13 hours
average
Sunshine
7 hours
average
Humidity
82 %
Overview: Onna
Weather charts for Onna
Weather overview
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Destinations nearby and activities
Destinations nearby
Activities in Onna
🏖️🌊
Sand beaches
🏖️🏝️
Tropical beaches
🤿🐠
Scuba diving
🥽🐟
Snorkelling
🌲
Forests
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Destinations with similar weather to Onna
Other destinations in Okinawa - Japan
Closest cities for Onna
YokohamaKōbeKitakyūshūKagoshimaKumamotoKawasakiOkayamaMatsuyamaSendaiShizuokaHamamatsuHachiōjiKanazawaNiigata
Weather overview for Onna
Weather overview
Located in the picturesque land of Onna, Japan, the area experiences a tropical climate distinguished by warm temperatures throughout the year. During daylight hours, one can expect temperature variations ranging from a cooler 19 °C (67 °F) in the chill of January, peaking to a balmy 31 °C (88 °F) in the heat of July. As for the ocean's embrace, the sea temperatures fluctuate from a fresh 21 °C (71 °F) in the depths of February to a soothing 29 °C (84 °F) come August. With variability in precipitation, October sees a sparse 10 of rain, distinguishing it as the driest spell, while the torrential showers of August mark it as the wettest period, boasting 15 of rainfall. This region's evenings also offer a climate spectrum, with the mercury dropping to 14 °C (57 °F) during the January nightfall, and rising to a peak of 26 °C (79 °F) during the sultry July nights.
January weather
In January, Onna's sea temperature slightly cools to 22 °C (72 °F), coinciding with the lowest daytime temperatures of the year at 19 °C (67 °F). The night temperature also reaches its nadir at 14 °C (57 °F). The least amount of cloudless sunshine is recorded this month, while the uptick in rainy days begins, totaling 12.
February weather
February observes the lowest sea temperatures for the year at Onna, recorded at 21 °C (71 °F). A gradual increase in precipitation volume begins this month, totaling 121 mm (4.75 in), alongside a slight increase in wet days reaching 13.
March weather
With the advent of spring, there is a noticeable rise in Onna's daytime temperatures, now at 21 °C (70 °F), paralleled by climbing night temperatures. A continuous climb in sunlight hours is apparent, clocking in at 3 hours. Precipitation quantities keep rising, now reaching 164 mm (6.46 in).
April weather
April in Onna is marked by a steady climb in daytime temperatures to 24 °C (75 °F) and a gentle increase in sea temperatures. A slight retreat in the number of rainy days is noted, yet there is an ongoing rise in rainfall totals, now at 173 mm (6.80 in). Longer nights experience a temperature rise, now averaging 18 °C (65 °F), and the days grow sunnier, boasting an average of 5 hours of clear skies.
May weather
May in Onna signals the onset of the tourist season with escalating sea temperatures and a continued rise in daytime warmth, now averaging 26 °C (80 °F). A gradual increase in the frequency of rainy days is observed, now at 13, alongside a surge in rainfall volume, amounting to 235 mm (9.26 in). Nighttime temperatures also exhibit a rising trend, currently averaging 21 °C (70 °F).
June weather
June brings ideal conditions for holiday-goers in Onna. Seawater temperatures ascend to a comfortable 26 °C (80 °F), and the warmth of the day escalates to an inviting 29 °C (84 °F). A peak in rainfall amounts is registered at 255 mm (10.03 in), matched by a gradual rise in rainy days to 13. Nighttime brings a mild 24 °C (75 °F), maintaining the pleasant ambience.
July weather
Enjoy the acme of warm weather in July at Onna, as day temperatures soar to their highest at 31 °C (88 °F), and the sea's warmth peaks at 29 °C (83 °F). The initial signs of a decrease in rainfall commence this month, while the nighttime warmth tops out at an average 26 °C (79 °F), complemented by an abundance of sunlight, peaking at 8 hours per day.
August weather
August in Onna marks a continuation of the holiday season, with the sea temperature touching its zenith at 29 °C (84 °F). This month also experiences the maximum number of rainy days, reaching 15, and a perceivable dip in sunshine hours down to 7 hours.
September weather
As September arrives in Onna, a subtle cooldown commences, with the sea temperature starting to recede to 28 °C (83 °F). Rainfall levels begin to drop, recorded at 213 mm (8.37 in), and there is a slight fall in the count of rainy days, now noted at 14. The descent in nighttime temperatures also becomes noticeable.
October weather
October in Onna sees a continued reduction in the day's heat, now at 28 °C (82 °F), with sea temperatures also trending downwards, registering at 27 °C (80 °F). Onna's touristic appeal persists as the number of wet days diminishes to a minimum, while the descent in rainfall continues, with a total of 153 mm (6.03 in). The chill in the night air starts to be felt.
November weather
The tourist season maintains its presence in November, with day temperatures in Onna gently ebbing to 25 °C (76 °F), and the sea's embrace also cooling to 25 °C (77 °F). A continued drop in precipitation is noted, now at 121 mm (4.76 in). The dwindling in nighttime temperatures is further accentuated.
December weather
December marks the year's conclusion with a continuation of falling day temperatures, now at 21 °C (70 °F), and the sea temperature also follows suit, registering a decline. The night temperatures also draw in, reflecting the cooler 16 °C (60 °F). Rainfall abates to reach its minimum volume, while the duration of sunshine hours contracts, mirroring the shorter daylight span of 10 hours.
FAQs
What are January's night temperatures like in Onna?
During January nights in Onna, temperatures cool down to about 14 °C (57 °F).
What's the sea temperature in Onna during February?
In Onna, the sea temperature dips to its yearly low of approximately 21 °C (71 °F) in February.
How does the daylight evolve in March in Onna?
March sees an increase in daylight hours in Onna, with an average daily sunshine duration of 3 hours.
Is the weather getting warmer in Onna during April?
Indeed, Onna's weather becomes warmer in April with daytime temperatures reaching an average of 24 °C (75 °F).
Is May a wet month in Onna?
May in Onna experiences a noticeable uptick in rainfall, with an average of 13 experiencing rain.
What's the likelihood of rain in Onna during June?
June in Onna presents a relatively high likelihood of rain, with roughly 13 expected to be wet.
How sunny is July in Onna?
July in Onna is the sunniest month, offering an impressive average of 8 hours of clear skies each day.
Is August the wettest month in Onna?
Yes, August is the wettest month in Onna with an average of 15 of rainfall.
What changes occur in the sea temperatures in Onna in September?
In September, there is a gradual decrease in Onna's sea temperatures, now averaging 28 °C (83 °F).
What's the trend for rainy days in Onna during October?
In Onna, October sees a downward trend in rainy days, with the number reducing to a low of 10.
How does the weather in Onna transition in November?
In Onna, November sees a transition towards cooler weather, with daytime temperatures averaging 25 °C (76 °F).
How much does it rain in Onna in December?
Onna sees the least rainfall in December, with precipitation volumes reaching a minimum.
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