MONTH YEAR TEMP (F) CO2 Jan 1958 43.03 Feb 45.88 Mar 41.95 315.71 Apr 46.32 317.45 May 48.48 317.50 Jun 50.75 Jul 47.65 315.86 Aug 47.65 314.93 Sep 48.82 313.19 Oct 47.21 Nov 45.82 313.34 Dec 42.23 314.67 Jan 1959 43.27 315.58 Feb 41.29 316.47 Mar 45.05 316.65 Apr 46.93 317.71 May 47.53 318.29 Jun 50.97 318.16 Jul 49.50 316.55 Aug 47.18 314.80 Sep 47.32 313.84 Oct 47.87 313.34 Nov 44.74 314.81 Dec 41.61 315.59 Jan 1960 42.11 316.43 Feb 40.66 316.97 Mar 39.65 317.58 Apr 42.33 319.03 May 46.39 320.03 Jun 47.33 319.59 Jul 47.26 318.18 Aug 48.50 315.91 Sep 48.93 314.16 Oct 45.16 313.83 Nov 43.63 315.00 Dec 41.40 316.19 Jan 1961 42.37 316.89 Feb 42.09 317.70 Mar 43.18 318.54 Apr 44.45 319.48 May 43.73 320.58 Jun 49.13 319.78 Jul 48.03 318.58 Aug 48.11 316.79 Sep 46.41 314.99 Oct 44.16 315.31 Nov 41.87 316.10 Dec 40.65 317.01 Jan 1962 40.94 317.94 Feb 38.39 318.56 Mar 38.69 319.69 Apr 43.02 320.58 May 42.82 321.01 Jun 46.82 320.61 Jul 48.21 319.61 Aug 48.19 317.40 Sep 47.02 316.26 Oct 46.90 315.42 Nov 44.07 316.69 Dec 42.98 317.69 Jan 1963 40.41 318.74 Feb 43.04 319.08 Mar 39.81 319.86 Apr 42.03 321.39 May 41.10 322.24 Jun 44.97 321.47 Jul 45.02 319.74 Aug 47.63 317.77 Sep 47.58 316.21 Oct 46.05 315.99 Nov 43.52 317.07 Dec 44.70 318.36 Jan 1964 41.08 319.57 Feb 39.45 Mar 39.03 Apr 41.78 May 43.69 322.23 Jun 48.80 321.89 Jul 46.42 320.44 Aug 47.31 318.70 Sep 46.58 316.70 Oct 45.24 316.87 Nov 41.18 317.68 Dec 41.71 318.71 Jan 1965 41.56 319.44 Feb 35.57 320.44 Mar 39.50 320.89 Apr 41.93 322.13 May 43.76 322.16 Jun 47.28 321.87 Jul 46.03 321.21 Aug 46.47 318.87 Sep 45.95 317.81 Oct 45.74 317.30 Nov 44.00 318.87 Dec 41.68 319.42 Jan 1966 42.29 320.62 Feb 40.64 321.59 Mar 44.19 322.39 Apr 43.00 323.70 May 46.32 324.07 Jun 51.72 323.75 Jul 50.03 322.40 Aug 48.79 320.37 Sep 47.60 318.64 Oct 45.89 318.10 Nov 43.05 319.79 Dec 40.81 321.03 Jan 1967 39.19 322.33 Feb 43.36 322.50 Mar 41.34 323.04 Apr 41.13 324.42 May 43.44 325.00 Jun 46.77 324.09 Jul 47.79 322.55 Aug 47.16 320.92 Sep 47.62 319.26 Oct 45.42 319.39 Nov 42.03 320.72 Dec 40.35 321.96 Jan 1968 41.42 322.57 Feb 42.10 323.15 Mar 43.08 323.89 Apr 41.45 325.02 May 46.58 325.57 Jun 47.62 325.36 Jul 47.52 324.14 Aug 47.44 322.11 Sep 45.15 320.33 Oct 46.21 320.25 Nov 46.80 321.32 Dec 42.10 322.90 Jan 1969 39.18 324.00 Feb 41.52 324.42 Mar 39.83 325.64 Apr 43.40 326.66 May 47.08 327.38 Jun 49.43 326.70 Jul 48.18 325.89 Aug 46.35 323.67 Sep 48.75 322.38 Oct 46.89 321.78 Nov 44.68 322.85 Dec 43.45 324.12 Jan 1970 41.23 325.06 Feb 42.12 325.98 Mar 42.06 326.93 Apr 39.68 328.13 May 43.84 328.07 Jun 49.05 327.66 Jul 46.15 326.35 Aug 47.13 324.69 Sep 46.55 323.10 Oct 45.58 323.07 Nov 42.10 324.01 Dec 37.87 325.13 Jan 1971 36.56 326.17 Feb 40.73 326.68 Mar 42.48 327.18 Apr 40.23 327.78 May 42.47 328.92 Jun 47.17 328.57 Jul 46.92 327.37 Aug 44.97 325.43 Sep 44.80 323.36 Oct 46.27 323.56 Nov 42.15 324.80 Dec 39.08 326.01 Jan 1972 37.84 326.77 Feb 38.72 327.63 Mar 42.55 327.75 Apr 40.65 329.72 May 42.37 330.07 Jun 47.25 329.09 Jul 46.84 328.05 Aug 46.87 326.32 Sep 46.43 324.84 Oct 45.73 325.20 Nov 45.55 326.50 Dec 43.90 327.55 Jan 1973 44.95 328.54 Feb 42.39 329.56 Mar 38.66 330.30 Apr 45.05 331.50 May 44.05 332.48 Jun 51.50 332.07 Jul 47.95 330.87 Aug 48.23 329.31 Sep 48.57 327.51 Oct 46.93 327.18 Nov 42.22 328.16 Dec 40.47 328.64 Jan 1974 40.16 329.35 Feb 39.00 330.71 Mar 39.82 331.48 Apr 332.65 May 42.45 333.09 Jun 44.95 332.25 Jul 44.92 331.18 Aug 47.05 329.40 Sep 45.53 327.44 Oct 44.34 327.37 Nov 40.83 328.46 Dec 40.30 329.58 Jan 1975 36.23 330.40 Feb 38.37 331.41 Mar 41.29 332.04 Apr 42.50 333.31 May 44.39 333.96 Jun 47.73 333.59 Jul 44.81 331.91 Aug 45.89 330.06 Sep 46.65 328.56 Oct 45.40 328.34 Nov 42.87 329.49 Dec 39.13 330.76 Jan 1976 36.71 331.74 Feb 37.12 332.56 Mar 36.71 333.50 Apr 39.83 334.58 May 42.34 334.87 Jun 47.38 334.34 Jul 46.60 333.05 Aug 46.55 330.94 Sep 44.40 329.30 Oct 44.48 328.94 Nov 330.31 Dec 41.71 331.68 Jan 1977 44.44 332.92 Feb 43.48 333.42 Mar 40.82 334.70 Apr 41.93 336.07 May 45.00 336.74 Jun 46.67 336.27 Jul 48.02 334.93 Aug 47.76 332.75 Sep 47.10 331.58 Oct 45.77 331.16 Nov 44.87 332.40 Dec 43.35 333.85 Jan 1978 42.92 334.97 Feb 42.75 335.39 Mar 42.73 336.64 Apr 41.75 337.76 May 45.74 338.01 Jun 45.72 337.89 Jul 45.76 336.54 Aug 46.24 334.68 Sep 45.65 332.76 Oct 45.02 332.54 Nov 40.62 333.92 Dec 39.90 334.95 Jan 1979 37.46 336.23 Feb 38.00 336.76 Mar 39.89 337.96 Apr 43.29 338.89 May 46.06 339.47 Jun 46.87 339.29 Jul 47.47 337.73 Aug 47.52 336.09 Sep 47.38 333.91 Oct 45.85 333.86 Nov 44.98 335.29 Dec 45.03 336.73 Jan 1980 42.50 338.01 Feb 45.63 338.36 Mar 40.61 340.08 Apr 44.28 340.77 May 45.48 341.46 Jun 48.15 341.17 Jul 48.26 339.56 Aug 47.87 337.60 Sep 47.23 335.88 Oct 46.85 336.01 Nov 46.90 337.10 Dec 45.97 338.21 Jan 1981 45.26 339.23 Feb 42.24 340.47 Mar 43.02 341.38 Apr 43.48 342.51 May 48.92 342.91 Jun 49.28 342.25 Jul 50.16 340.49 Aug 48.18 338.43 Sep 47.30 336.69 Oct 46.19 336.85 Nov 46.20 338.36 Dec 44.85 339.61 Jan 1982 42.05 340.75 Feb 41.62 341.61 Mar 40.08 342.70 Apr 43.93 343.56 May 46.27 344.13 Jun 49.03 343.35 Jul 48.26 342.06 Aug 46.92 339.82 Sep 45.65 337.97 Oct 47.89 337.86 Nov 48.13 339.26 Dec 44.84 340.49 Jan 1983 47.48 341.37 Feb 45.62 342.52 Mar 47.34 343.10 Apr 43.33 344.94 May 46.66 345.75 Jun 47.93 345.32 Jul 50.66 343.99 Aug 49.53 342.39 Sep 47.41 339.86 Oct 46.03 339.99 Nov 47.83 341.16 Dec 43.48 342.99 Jan 1984 41.30 343.70 Feb 41.48 344.51 Mar 45.61 345.28 Apr 44.66 347.08 May 45.92 347.43 Jun 51.28 346.79 Jul 47.41 345.40 Aug 49.76 343.28 Sep 46.98 341.07 Oct 47.97 341.35 Nov 45.48 342.98 Dec 42.77 344.22 Jan 1985 44.37 344.97 Feb 42.02 346.00 Mar 40.68 347.43 Apr 42.40 348.35 May 45.21 348.93 Jun 48.40 348.25 Jul 48.82 346.56 Aug 48.74 344.69 Sep 48.82 343.09 Oct 47.60 342.80 Nov 46.15 344.24 Dec 45.29 345.56 Jan 1986 47.77 346.29 Feb 46.41 346.96 Mar 46.24 347.86 Apr 43.80 349.55 May 47.95 350.21 Jun 50.22 349.54 Jul 49.11 347.94 Aug 50.68 345.91 Sep 48.43 344.86 Oct 48.23 344.17 Nov 46.70 345.66 Dec 47.25 346.90 Jan 1987 43.52 348.02 Feb 348.47 Mar 43.85 349.42 Apr 46.60 350.99 May 45.73 351.84 Jun 46.38 351.25 Jul 48.16 349.52 Aug 49.87 348.10 Sep 48.10 346.44 Oct 48.69 346.36 Nov 45.47 347.81 Dec 44.47 348.96 Jan 1988 43.18 350.43 Feb 41.41 351.72 Mar 42.70 352.22 Apr 43.47 353.59 May 47.16 354.22 Jun 50.02 353.79 Jul 47.84 352.39 Aug 49.02 350.44 Sep 49.30 348.72 Oct 46.16 348.88 Nov 44.19 350.07 Dec 41.18 351.34 Jan 1989 38.31 352.76 Feb 39.70 353.07 Mar 42.55 353.68 Apr 39.50 355.42 May 42.32 355.67 Jun 47.98 355.13 Jul 47.53 353.90 Aug 48.55 351.67 Sep 48.63 349.80 Oct 46.32 349.99 Nov 45.93 351.30 Dec 43.53 352.53 Jan 1990 42.66 353.66 Feb 40.52 354.70 Mar 43.05 355.39 Apr 46.48 356.20 May 47.74 357.16 Jun 50.80 356.22 Jul 45.85 354.82 Aug 48.85 352.91 Sep 46.41 350.96 Oct 46.26 351.18 Nov 45.65 352.83 Dec 42.05 354.21 Jan 1991 43.91 354.72 Feb 44.04 355.75 Mar 40.95 357.16 Apr 45.05 358.60 May 47.40 359.34 Jun 47.47 358.24 Jul 50.85 356.17 Aug 47.37 354.03 Sep 48.48 352.16 Oct 48.10 352.21 Nov 47.83 353.75 Dec 44.13 354.99 Jan 1992 44.74 355.98 Feb 43.48 356.72 Mar 45.21 357.81 Apr 47.15 359.15 May 48.85 359.66 Jun 51.62 359.25 Jul 48.53 357.03 Aug 47.95 355.00 Sep 47.90 353.01 Oct 48.32 353.31 Nov 46.82 354.16 Dec 43.82 355.40 Jan 1993 41.50 356.70 Feb 43.33 357.16 Mar 42.91 358.38 Apr 47.75 359.46 May 46.33 360.28 Jun 51.86 359.60 Jul 48.38 357.57 Aug 49.13 355.52 Sep 46.39 353.70 Oct 46.74 353.98 Nov 45.05 355.33 Dec 45.00 356.80 Jan 1994 42.65 358.36 Feb 41.58 358.91 Mar 44.13 359.97 Apr 46.12 361.26 May 47.38 361.68 Jun 48.84 360.95 Jul 49.42 359.55 Aug 49.09 357.49 Sep 47.47 355.84 Oct 47.97 355.99 Nov 44.95 357.58 Dec 47.05 359.04 Jan 1995 47.17 359.96 Feb 42.11 361.00 Mar 45.74 361.64 Apr 46.78 363.45 May 47.91 363.79 Jun 52.00 363.26 Jul 49.83 361.90 Aug 48.57 359.46 Sep 51.17 358.06 Oct 48.43 357.75 Nov 45.03 359.56 Dec 45.58 360.70 Jan 1996 42.16 362.05 Feb 41.90 363.25 Mar 41.42 364.03 Apr 47.05 364.72 May 49.91 365.41 Jun 48.08 364.97 Jul 48.35 363.65 Aug 49.39 361.49 Sep 49.33 359.46 Oct 47.93 359.60 Nov 45.58 360.76 Dec 43.64 362.33 Jan 1997 43.88 363.18 Feb 41.81 364.00 Mar 40.36 364.57 Apr 44.52 366.35 May 46.36 366.79 Jun 48.81 365.62 Jul 49.93 364.47 Aug 49.31 362.51 Sep 47.48 360.19 Oct 47.91 360.77 Nov 44.29 362.43 Dec 45.02 364.28 Jan 1998 47.17 365.32 Feb 47.03 366.15 Mar 46.20 367.31 Apr 45.68 368.61 May 47.05 369.29 Jun 51.43 368.87 Jul 49.02 367.64 Aug 48.19 365.77 Sep 47.95 363.90 Oct 47.67 364.23 Nov 45.72 365.46 Dec 44.61 366.97 Jan 1999 41.84 368.15 Feb 40.50 368.87 Mar 42.52 369.59 Apr 40.82 371.14 May 47.22 371.00 Jun 50.05 370.35 Jul 49.52 369.27 Aug 50.02 366.94 Sep 47.38 364.63 Oct 48.67 365.12 Nov 45.08 366.67 Dec 42.42 368.01 Jan 2000 39.17 369.14 Feb 44.03 369.46 Mar 43.20 370.52 Apr 45.72 371.66 May 48.36 371.82 Jun 49.50 371.70 Jul 49.03 370.12 Aug 49.33 368.12 Sep 48.82 366.62 Oct 47.34 366.73 Nov 47.58 368.29 Dec 45.00 369.53 Jan 2001 45.60 370.28 Feb 41.45 371.50 Mar 42.64 372.12 Apr 43.79 372.87 May 46.18 374.02 Jun 46.76 373.30 Jul 48.76 371.62 Aug 49.20 369.55 Sep 48.82 367.96 Oct 47.34 368.09 Nov 47.58 369.68 Dec 45.00 371.24 Jan 2002 43.76 372.43 Feb 42.18 373.09 Mar 40.48 373.52 Apr 47.03 374.86 May 45.09 375.55 Jun 50.08 375.40 Jul 50.84 374.02 Aug 49.86 371.49 Sep 49.38 370.71 Oct 47.55 370.24 Nov 49.79 372.08 Dec 45.69 373.78 Jan 2003 47.00 374.68 Feb 46.18 375.63 Mar 46.14 376.11 Apr 44.14 377.65 May 45.43 378.35 Jun 48.48 378.13 Jul 49.43 376.62 Aug 49.48 374.50 Sep 48.57 372.99 Oct 49.43 373.00 Nov 47.72 374.35 Dec 44.64 375.70 Jan 2004 43.84 376.79 Feb 45.29 377.37 Mar 41.59 378.41 Apr 42.59 380.52 May 45.75 380.63 Jun 49.19 379.57 Jul 48.75 377.79 Aug 50.02 375.86 Sep 47.24 374.06 Oct 44.83 374.24 Nov 44.42 375.86 Dec 43.69 377.48