December 2021 Weather Summary

December was 6.9 deg F above normal for temperature. The high for the month was 65.9 deg. F, recorded on December 16. The low for the month was 15.8 deg F, recorded on December 20. There were 17 days when the minimum temperature was at or below 32 F and 0 days when the maximum temperature was at or below 32 F. There were 816 heating degree days and 0 cooling degree days.

December was a below-normal month for precipitation with 2.69 inches of rainfall recorded, which was 0.44 inches below normal. The maximum rainfall in a single day was 1.05 inches recorded on December 28. There were 12 days of rain >.01 in, 7 >.10 in and 1 > 1 in.

High wind speed of 40 mph on December 11.

Snowfall for December: 3.0 inches

December 2021 Data

2021 Stormstown Weather Summary

Overall, the year’s temperatures were above normal. The annual mean of 52.0 F was 1.8 F above normal. The annual precipitation of 40.17 inches was 0.53 inches below normal.

2021 Weather Data

January

January was a bit warmer than normal with a monthly mean of 30.7 F, which was 2.6 F above normal, with a high of 48 F and a low for the month of 14 F. Precipitation was 2.06 inches below normal with 1.05 inches of liquid precipitation. There were 3 inches of snow this month.

February

February was the coldest month of 2021 with a mean of 34.7 F, which was 1.2 F below normal. The high was 58 F and the low was 3 F, which was also the low for the year. Precipitation was 0.66 inches below normal at 1.61 inches. There were 13 inches of snowfall this month.

March

March temperatures were also mild at 5.3 F above normal with a high of 70 F and a low of 14 F. Precipitation was 0.86 inches below normal with 2.69 inches of liquid precipitation. The high wind speed for the month and year was 47 mph.

April

Temperatures were 1.2 F above normal in April. The high was 83 F and the low was 22 F. Rainfall was 1.12 inches below normal at 2.27 inches. The last day of temperatures below freezing was April 22.

May

Temperatures were cooler at 1.3 F below normal with a high of 88 F and a low of 32 F. Precipitation was 3.67 inches, 0.44 inches above normal.

June

Damaged Trees Blocking PA 550 near Patton/Halfmoon Township Line
June 21, 2021 – Photo by George Riley

Temperatures for the month were 1.0 F above normal with a mean of 80.6 F. The high was 92 F and the low was 41 F. Precipitation was 2.56 inches above normal with 6.42 inches of rainfall.

July

The temperatures were 0.4 F below normal at a mean of 82.4. The high for the month was 92 F and the low was 50 F. Rainfall was 0.38 inches below normal with 3.08 inches of precipitation.

August

August was the warmest month this year. The month’s temperatures were 1.8 F above normal at a mean of 83.4. The high was 93 F and the low was 49 F. Precipitation was 0.88 inches above normal at 5.02 inches.

September

Temperatures were above normal this month with a mean of 75.0 F. The high was 86 F and the low was 42 F. There were 6.82 inches of rainfall, which was 2.84 inches above normal. This was the rainiest month of the year.

October

October was very mild with temperatures at 6.4 F above normal. The high was 79 F and the low was 36 F. Rainfall was near normal at 3.40 inches, which was 0.06 inches above normal.

November

Temperatures were cooler in November and were 2.6 F below normal. The high was 69 F and the low was 20 F. Precipitation was 1.45 inches, 1.79 inches below normal. The first freeze was on November 2. There was also less than 0.5 inches of snowfall.

December

December was very mild with a mean temperature of 46.5 F, 6.9 F above normal. The high was 66 F and the low was 16 F. Precipitation was 0.44 inches below normal at 2.69 inches. There was also 3 inches of snowfall.

2021 Insolation

2021 Daily Solar Radiation (W/m**2)

2021 Atlantic Hurricane Season

The 2021 Atlantic hurricane season has officially ended. Although all of the official names were used, four of those storms were short-lived or extratropical, and, in my humble opinion, should not have been named (Ana, Odette, Teresa, Wanda). There were officially 21 named storms, but there were really just 17. There were 7 hurricanes of which 4 were major. One of those, Ida, made landfall in the U.S. None of the storms exceeded Category 4. Ida and Sam were the strongest this year at Category 4. The Accumulated Cyclone Energy (ACE) for the season was lower than 2020.

Summary of Autumn 2021

Meteorological Autumn is officially over. Here is a brief summary of September 1-November 30 in Stormstown, PA:  

Number of days Max T >= 90 F: 0

Number of Days Max T <= 32 F: 0

Number of Days Min T <= 32 F: 20

Max T: 85.7 F – September 18, 2021

Min T: 20.2 F – November 24, 2021

Sep Dep from Normal: 1.4 F

Oct Dep from Normal: 6.4 F

Nov Dep from Normal: -2.6 F

Heating Degree Days: 1146

Cooling Degree Days: 120

Sep Precip: 6.82″, 2.84″ above normal

Oct Precip: 3.40″, 0.06″ above normal

Nov Precip: 1.45″, 1.79″ below normal

November 2021 Weather Summary

November was 2.6 deg F below normal for temperature. The high for the month was 69.0 deg. F, recorded on November 9. The low for the month was 20.2 deg F, recorded on November 24. There were 20 days at or below 32 F and 0 days when the maximum temperature was at or below 32 F. There were 774 heating degree days and 1 cooling degree day.

November was a below-normal month for precipitation with 1.45 inches of rainfall recorded, which was 1.79 inches below normal. The maximum rainfall in a single day was 0.96 inches recorded on November 12. There were 9 days of rain >.01 in, 2 >.10 in and 0 > 1 in. There was also 1.2 inches of snow this month.

High wind speed of 37 mph on November 26.

November 2021 Data

October 2021 Weather Summary

Foliage on Bald Eagle Mountain in Halfmoon Twp. – November 1, 2021

October was 6.4 deg F above normal for temperature. The high for the month was 79.4 deg. F recorded on October 15. The low for the month was 36.2 deg F, recorded on Oct 24. There were 0 days at or above 90 deg F and 0 days at or below 32 deg F. There were 252 heating degree days and 28 cooling degree days.

October was above average for precipitation with 3.40 inches of rainfall recorded, which was 0.06 inches above normal. The maximum rainfall in a single day was 1.23 inches recorded on October 29. There were 15 days of rain >.01 in, 8 >.10 in and 1 > 1 inch.

High wind speed of 31 mph on October 26.

October 2021 Data

September 2021 Weather Summary

September was 1.4 deg F above normal for temperature. The high for the month was 85.7 deg. F recorded on September 18. The low for the month was 42.1 deg F, recorded on September 30. There were 0 days at or above 90 deg F and 0 days at or below 32 deg F. There were 120 heating degree days and 91 cooling degree days.

September had 6.82 inches of rainfall recorded, which was 2.84 inches above normal. The maximum rainfall in a single day was 1.96 inches recorded on September 1. There were 8 days of rain >.01 in, 8 >.10 in and 3 > 1 in.

High wind speed of 28 mph on September 28.

September 2021 Data

Summary 0f Summer 2021

Meteorological Summer is officially over. Here is a brief summary of June 1-August 31 in Stormstown, PA:

Number of days Max T >= 90 F: 7

Max T: 92.3 F – August 12, 2021

Min T: 41.4 F – June 23, 2021

Jun Dep from Normal: 1.0

Jul Dep from Normal: -0.4 F

Aug Dep from Normal: 1.8 F

Heating Degree Days: 117

Cooling Degree Days: 657

Jun Precip: 6.42″, 2.56″ above normal  

Jul Precip: 3.08″, 0.38″ below normal  

Aug Precip: 5.02″, 0.88″ above normal  

The main event of the summer were the passage of the remnants of Tropical Storm Fred, on August 18, which yielded 2.26 inches of rainfall.

August 2021 Weather Summary

August was 1.8 deg F above normal for temperature. The high for the month was 92.3 deg. F recorded on August 12. The low for the month was 48.8 deg F, recorded on August 3. There were 4 days at or above 90 deg F. There were 22 heating degree days and 245 cooling degree days.

August was an above normal month for precipitation with 5.02 inches of rainfall recorded, which was 0.88 inches above normal. The maximum rainfall in a single day was 2.26 inches recorded on August 18 (the remnants of Tropical Storm Fred). There were 15 days of rain >.01 in, 9 >.10 in and 1 >1 in.

High wind speed of 37 mph on August 12

August 2021 Data

July 2021 Weather Summary

July was 0.4 deg F below normal for temperature. The high for the month was 91.8 deg. F recorded on July 7. The low for the month was 49.6 deg F, recorded on July 31. There was a single day at or above 90 deg F! There were 32 heating degree days and 224 cooling degree days.

July was a below normal month for precipitation with 3.08 inches of rainfall recorded, which was 0.38 inches below normal. The maximum rainfall in a single day was 0.69 inches recorded on July 7. There were 12 days of rain >.01 in, 7 >.10 in and 0 >1 in.

High wind speed of 43 mph on July 7.

July 2021 Data