Newnan (GA) Temperature by Month
The average annual maximum temperature in Newnan, Georgia, United States of America is 23°C (73°F), with daytime highs ranging from 12°C (54°F) in January to 32°C (90°F) in July. This page covers monthly averages, day-night differences, and how Newnan compares to cities worldwide.
Newnan Monthly Temperatures
In Newnan, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping from 20°C (68°F) in July to -1°C (30°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Newnan by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. July, the warmest month, averages 273 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Newnan 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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Newnan vs World: Temperature Compared
Newnan's average annual maximum temperature is 23°C (73°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Queenstown, New Zealand averages 10°C (50°F) annually — remember seasons are flipped, so its coldest months fall in June and July.
Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
What Does the Temperature Feel Like in Newnan?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Newnan, January is the coolest month, with average highs of 12°C (54°F) and humidity around 67% — considered high. In July, the warmest month, temperatures average 32°C (90°F) with 74% humidity — conditions that feel high. For a full picture, see our humidity page.
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.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Newnan's weather — including monthly rainfall, sunshine hours, and humidity — visit our Newnan climate page.
