Weather on December 18

Allentown, PA

55 Years of Data

Avg High
39°F
Avg Low
24°F
Warmest
2006
50°F avg
Coldest
1973
17°F avg

About This Date

December 18th in Allentown, PA typically brings cold winter weather, with average highs around 39°F and lows near 24°F. Over 55 years of records, the warmest December 18th was in 2006 (50°F average), while the coldest was 1973 (17°F) — a 33°F range across recorded history. Precipitation has occurred on 27% of recorded December 18th dates, with snow falling 7% of the time. The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.

The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.

Planning for December 18th in Allentown, PA? Bundle up with warm layers and protect extremities from the cold.

Warming Trend
1.6°F per decade on this date
YearHighLowAvgPrecipSnow
202549°18°33°0.2"
202450°25°38°0.51"
202358°35°46°5.03"
202239°26°33°
202142°36°39°0.33"
202032°14°23°
201936°19°28°0.05"0.5"
201840°22°31°
201747°34°40°
201648°30°39°0.38"
201551°36°43°
201439°34°36°
201334°11°23°
201252°40°46°0.41"
201135°19°27°
201033°13°23°
200931°15°23°
200839°28°34°
200734°21°27°
2006warmest62°37°50°
200538°22°30°
200444°17°31°
200334°29°31°
200236°12°24°
200151°38°44°0.89"
200030°19°25°
199942°28°35°
199839°23°31°
199744°24°34°
199649°39°44°0.03"
199535°21°28°0.03"0.2"
199450°33°42°
199340°22°31°0.3"0.1"
199244°27°35°
199135°17°26°
199048°38°43°1.42"
198925°17°
198831°14°22°
198736°24°30°
198643°38°40°2.51"
198528°13°20°
198459°37°48°
198332°18°25°
198229°15°22°
198132°16°24°
198038°23°
197931°18°24°
197840°28°34°
197733°30°32°2.97"
197642°28°35°
197535°18°26°
197436°26°31°
1973coldest23°10°17°
197236°16°26°
197133°19°26°0.1"1"
55 years of data from ALLENTOWN LEHIGH VLY INTL AP

Browse Weather History

Weather data provided by NOAA Climate Data Online. Not for critical planning.