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Weather & Climate

Cary Institute maintains a fully outfitted weather station at our campus in Millbrook, NY. The long-term data from this station can be used to understand our changing climate.

According to NOAA’s, National Weather Service climate is the composite of weather conditions of a region, while weather is the state of the atmosphere at a given point in time. In order to understand climate for a region, weather data must be collected in a consistent manner over a long period of time. The Cary Institute maintains a fully outfitted weather station at its campus in Millbrook, NY. The long-term data from this station can be used to understand our changing climate.

Data

For a complete description of measurements, please see the Meta Data | For monthly and yearly summaries go to Data Summaries | For access to data go to Archived Data

The Cary Institute's weather station was installed in 1988 and expanded in 2004 with the addition of a NOAA Climate Reference Network (CRN) station.

Data from our program includes air temperature, precipitation, snow depth, relative humidity, barometric pressure, wind speed and wind direction. In addition, we collect a diverse array of solar radiation data.

The station is also the site for air and precipitation monitoring including ground level ozone, carbon dioxide, and wet and dry deposition of acidic components of the atmosphere.

The CRN station provides temperature and precipitation data as well as soil moisture and temperature, surface temperature, wetness, solar radiation and wind speed at 1.5 meters.

Data from our program is in three-minute, hourly and daily increments. Data from the USCRN is in 5 minute, hourly and daily increments.

Daily Data Summary
DATE MIN. TEMP. (F) MAX. TEMP. (F) HDD SUM HDD TOTAL PRECIP. (in.) PRECIP. pH YTD PRECIP. (in.) SNOW DEPTH (in.) YTD SNOW (in.) AVE. WIND DIR. (deg) MAX. WIND SPEED (mph) MAX. UVB (mW per m^2) MAX. HOURLY AVG. OZONE (ppb)
12/1/2019 15.1 31 42 1289 0.69 5.57 42.71 3 5.5 65 16 10 32
12/2/2019 25.3 32.7 36 1325 0.87 5.57 43.57 5 10.5 67 20 7 37
12/3/2019 17 35.3 39 1364 0.12 5.57 43.69 2.5 13 61 22 24 41
12/4/2019 17.3 36.6 38 1402 0 . 43.69 0 13 241 13 17 29
12/5/2019 27.5 41.1 31 1433 0 . 43.69 0 13 18 28 28 35
12/6/2019 23.4 40.1 33 1466 0 . 43.69 0 13 315 19 16 32
12/7/2019 10.3 35.1 42 1508 0 . 43.69 0 13 79 11 25 36
12/8/2019 3.4 36.7 45 1553 0 . 43.69 0 13 233 14 23 31
12/9/2019 26 48.1 28 1581 0.7 NA 44.4 0 13 237 14 10 26
12/10/2019 31.9 49.9 24 1605 0.37 NA 44.76 0 13 268 18 7 25
Monthly Temperature & Precipitation Summary 2019
MONTH AVE. TEMP. (F) MIN. TEMP. (F) MAX. TEMP. (F) AVE. RH (%) AVE. WIND DIRECTION (deg) TOTAL PRECIP. (in) PRECIP. pH SNOW (in.) YEARLY SNOW (in.) TEMP. DEPARTURE FROM NORM (F) PRECIP. DEPARTURE FROM NORM (in.)
1 25.1 -6.8 54.9 67 298 4.5 5.09 10 19 -0.5 1.42
2 29.2 -12 63.9 67 279 2.94 5.1 7 26 0.6 0.28
3 35.5 -0.3 74.4 61 246 2.12 4.97 6.5 32.5 -1.3 -1.45
4 50 17.7 81.4 66 194 5.06 5.06 0 32.5 1.3 1.28
5 57.9 37.3 86.9 74 98 4.81 5.38 . . -0.9 0.4
6 66.9 35.6 91.6 69 145 2.41 4.79 . . -0.7 -2.02
7 74.4 52.7 99.1 68 173 5.07 4.91 . . 1.8 0.42
8 69.5 42.9 92.9 71 131 3.44 4.92 . . -1.6 -0.76
9 62.4 34.2 95.2 71 115 1.1 4.99 . . -0.7 -3.18
10 53.2 28.6 88.8 75 135 6.87 5.52 . . 2.2 2.4
11 35.6 10.6 67.9 70 127 4.17 5.35 2.5 2.5 -6.0 0.70
1988-2018 Temperature Means & Extremes (F)
Month Mean Daily Max. Mean Daily Min. Monthly Mean Record High Date Record Low Date
Jan 36 16 26 71 1/6/2007 -27 1/27/1994
Feb 39 18 29 78 2/21/2018 -18 2/24/2015
Mar 48 25 37 89 3/31/1998 -10 3/10/1996
Apr 61 35 48 96 4/17/2002 12 4/6/2016
May 72 46 59 96 5/18/2017 24 5/1/2008
Jun 80 54 67 98 6/25/2003 33 6/1/2001
Jul 85 59 72 103 7/22/2002 40 7/3/2001
Aug 83 58 70 103 8/14/2002 40 8/26/1989
Sep 75 50 62 96 9/8/2015 27 9/29/2000
Oct 63 39 51 87 10/6/2007 16 10/31/1988
Nov 51 30 41 79 11/3/2003 2 11/24/1989
Dec 40 22 31 75 12/7/1998 -14 12/24/1989
Year 61 38 50 103 8/14/2002 -27 1/27/1994
1988-2018 Mean Temperature & Total Precipitation
Year Avg. Temp (deg F) Total Precip. (inches) Frost Free Days No. Frost Free Days
1988 50 43.39 4/27-10/5 161
1989 47 44.14 5/5-9/24 142
1990 51 49.09 5/13-10/2 142
1991 51 40.48 4/27-9/21 147
1992 47 35.03 5/8-9/23 138
1993 48 39.15 4/29-9/19 143
1994 49 44.94 5/29-10/2 126
1995 48 42.5 5/10-9/28 141
1996 48 56.14 5/16-10/3 140
1997 48 37.98 5/9-9/21 135
1998 51 39.29 5/15-9/23 131
1999 51 41.46 5/2-10/6 157
2000 48 45.44 5/17-9/27 135
2001 50 31.39 5/15-9/15 123
2002 51 44.68 5/22-10/14 145
2003 48 54.39 5/5-10/3 151
2004 49 43.75 5/5-10/6 154
2005 50 54 5/13-10/21 161
2006 51 46.89 5/2-10/12 165
2007 50 47.94 5/14-10/13 152
2008 49 53.84 5/1-10/4 156
2009 49 42.91 5/19-10/10 144
2010 51 43.04 5/11-10/10 152
2011 50 64.69 5/6-10/6 153
2012 52 38.82 4/30-10/13 166
2013 49 47.94 5/15-10/23 161
2014 48 43.26 4/25-10/6 164
2015 49 40.69 5/14-10/11 150
2016 51 37.01 5/10-10/11 154
2017 50 39.94 5/11-10/17 159
2018 50 65.76 4/24-10/18 177
1992-2018 Total Snowfall
Snow Year Snowfall (inches)
1992-1993 61
1993-1994 65
1994-1995 21
1995-1996 92
1996-1997 35
1997-1998 20
1998-1999 28
1999-2000 32
2000-2001 52
2001-2002 19
2002-2003 91
2003-2004 43
2004-2005 58
2005-2006 34
2006-2007 32
2007-2008 37
2008-2009 34
2009-2010 43
2010-2011 68
2011-2012 27
2012-2013 45
2013-2014 66
2014-2015 69
2015-2016 13
2016-2017 60
2017-2018 68