Sea Isle Temperature by Month
Sea Isle, United States of America has an average annual maximum temperature of 25°C (77°F), ranging from 16°C (61°F) in January to 33°C (91°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Sea Isle Monthly Temperatures
In Sea Isle, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping from 27°C (81°F) in August to 9°C (48°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Sea Isle by month:
The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. August, the city's warmest month, gets 282 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Sea Isle vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
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Sea Isle vs World: Temperature Compared
Sea Isle's average annual maximum temperature is 25°C (77°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation — summers are often cool and foggy, winters mild.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Sea Isle's weather — including monthly rainfall, sunshine hours, and humidity — visit our Sea Isle climate page.
