* WHAT...Sub-freezing temperatures as low as 22. * WHERE...Portions of central, northern, northwest, and southern New Jersey and east central and southeast Pennsylvania. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Take steps now to protect tender plants from the cold.
AI Weather Forecast · Tuesday, April 21, 2026
56°F
Sunny
High / Low
56° / 42°
Wind
W 2 to 8 mph
Precip.
3%
Humidity
31%
Hourly Forecast
12 PM 1%
3 mph
1 PM 1%
5 mph
2 PM 1%
6 mph
3 PM 2%
7 mph
4 PM 2%
7 mph
5 PM 3%
8 mph
6 PM 4%
8 mph
7 PM 4%
8 mph
8 PM 3%
9 mph
9 PM 10%
8 mph
10 PM 13%
8 mph
11 PM 23%
8 mph
Precipitation probability
Daily
7 AM – 6 PM
56°
6 PM – 6 AM
42°
7 AM – 6 PM
Sunny, with a high near 56. West wind 2 to 8 mph.
6 PM – 6 AM
Rain showers likely after 11pm. Mostly cloudy. Low around 42, with temperatures rising to around 45 overnight. South wind around 9 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Model name
Conf.
Risk
Safe
claude-haiku-4-5
92%
low
Safe
claude-opus-4-6
90%
low
Safe
claude-opus-4-7
85%
low
Safe
claude-sonnet-4-6
85%
low
Safe
gemini-3-flash-preview
100%
low
Safe
gemini-3.1-flash-lite-preview
95%
low
Safe
gemini-3.1-pro-preview
95%
low
Safe
gemma-4-31b-it
100%
medium
Unsafe
gpt-5-mini
80%
medium
Safe
gpt-5.1
86%
low
Safe
gpt-5.4
83%
medium
Safe
gpt-5.4-mini
92%
low
Safe
kimi-k2.5
90%
low
Safe
llama-3.3-70b-instruct-fp8-fast
80%
low
Safe
nemotron-3-120b-a12b
70%
medium
Safe