Otago Provincial Gazette – 1866 – No. 411

Page 59

✨ Meteorological Observations



RESULTS OF METEOROLOGICAL OBSERVATIONS TAKEN AT DUNEDIN, OTAGO, N.Z., FOR THE YEARS 1863 AND 1864.

LATITUDE, 45° 53' 8" S. (ALTITUDE, 550 FEET.) LONGITUDE, 170° 31' 40" E.

Jan. Feb. March April. May. June. July. Aug. Sept. Oct. Nov. Dec. For Year. Jan. Feb. March April. May. June. July. Aug. Sept. Oct. Nov. Dec. For Year.
Mean Atmospheric Pressure:
Barometer reduced to 32° Fah. and sea level.. 29.944 29.882 29.960 29.826 30.011 30.080 29.740 29.727 29.596 29.741 29.595 29.731 29.819 Mean 29.708 29.755 30.056 30.100 29.848 29.987 30.058 29.960 29.876 30.008 29.870 30.011 29.937 Mean
Approximate range 1.244 7.316 .911 .934 1.190 1.062 1.293 1.153 1.096 .951 1.370 1.016 1.129* " .990 1.639 1.173 1.094 1.568 1.317 1.124 1.128 1.088 .917 .816 .722 1.128* "
Average Max. temperature in shade (Fah.) 69.1 69.0 65.6 53.6 57.8 52.7 51.5 51.3 56.2 57.1 61.2 62.8 59.4 " 65.6 66.2 63.1 62.6 55.6 49.7 50.9 49.9 57.1 58.7 63.4 67.1 59.1 "
Average Min. temperature in shade 49.6 50.4 48.4 42.4 41.4 37.9 37.5 37.9 40.8 42.7 44.3 46.0 43.2 " 47.8 49.0 45.7 46.4 41.2 37.9 37.1 35.9 40.3 41.7 43.1 48.9 42.9 "
Approximate Mean temperature in shade 59.3 59.7 57.0 50.5 49.6 45.3 44.5 44.6 48.5 49.9 52.7 54.4 51.3 " 56.7 57.6 54.4 54.5 48.4 43.8 44.0 42.9 48.7 50.2 53.2 58.0 51.0 "
Mean daily range in shade 19.5 18.6 17.2 16.2 16.4 14.8 14.0 13.4 15.4 14.4 16.9 16.8 16.1 " 17.8 17.2 17.4 16.2 14.4 11.8 13.8 14.0 16.8 17.0 20.3 18.2 16.2 "
Max. in shade.. 84.7 89.9 79.7 74.4 71.6 67.2 63.9 62.0 67.9 68.7 74.0 76.0 89.9 (a) Max. 76.0 88.0 74.0 77.0 66.1 60.0 57.5 62.0 69.0 68.0 74.6 77.8 88.0 (a) Max.
Mean in shade.. 42.0 40.0 42.0 33.2 33.5 31.1 33.0 30.2 31.0 36.5 38.5 36.0 30.2 (b) Min. 41.8 39.8 37.0 36.5 33.0 30.2 29.8 30.0 35.0 33.2 39.0 39.1 29.8 (b) Min.
Range (extreme).. 42.7 49.9 37.7 41.2 38.1 36.1 29.9 31.8 36.9 32.2 35.5 40.0 37.6 Mean 34.2 48.2 37.0 40.5 33.1 29.8 27.7 32.0 34.0 34.8 35.6 38.7 35.4 Mean
Mean solar radiation (temperature in sun's rays).. 106 104 101 88 81 70 67 75 66 83 100 98 88 (c) Max. 104 109 97 88 73 66 73 74 89 89 100 100 88.0 "
Max. in sun's rays 121 126 126 107 95 89 88 93 100 107 118 123 126 (c) Max. 115 111 111 108 92 83 85 88 99 108 113 112 115 (c) Max.
Mean nocturnal radiation (thermometer on grass).. ... ... ... 38 35 34 34 35 37 38 ... ... 36.2 Mean ... ... ... ... ... ... 32 33 34 40 46 37.3 Mean
(7 months) (6 months)
Min. on grass.. ... ... ... 31 31 26 29 26 29 34 ... ... 26.0 (d) Min. ... ... ... ... ... ... 27 27 32 32 34 36 27.0 (d) Min.
Mean degree of moisture (saturation = 100) 69 71 68 68 68 66 66 70 60 71 70 69 68 Mean 67 69 69 72 67 75 73 71 68 67 63 69 69 Mean
Mean elastic force of vapour (in inches of mercury) .369 .364 .352 .282 .264 .220 .216 .229 .226 .271 .285 .318 .282 Mean .328 .334 .309 .324 .244 .329 .230 .217 .254 .256 .274 .300 .279 Mean
Mean temperature of dew point 50.6 50.2 49.3 43.4 41.7 36.9 36.5 38.0 37.6 42.3 43.7 46.6 43.0 Mean 47.4 47.9 45.9 47.1 39.7 38.0 38.1 36.6 40.7 40.8 42.7 49.9 43.9 Mean
Total evaporation (in inches).. 3.78 3.94 2.26 1.32 1.17 .91 .89 1.21 2.14 3.65 3.39 3.24 28.90 Total 3.92 2.88 2.72 1.77 1.69 1.32 .95 1.16 1.63 1.43 2.69 2.86 25.02 Total
Total rainfall (in inches).. 2.012 2.128 3.040 2.250 .539 1.358 2.307 1.679 2.282 5.074 5.302 4.646 33.627 Total 2.631 2.616 1.754 .958 1.760 2.498 .410 2.173 2.016 2.545 3.158 1.745 24.264 Total
Number of days on which rain fell 10 13 13 19 6 14 14 13 15 20 20 21 178 Total 20 15 15 15 17 19 8 19 15 14 19 10 186 Total
Greatest rainfall in 24 hours .850 .620 .500 .610 .122 .450 .750 .470 1.100 .761 1.090 1.100 (e) Max. 1.250 .910 .460 .445 .680 .430 .100 .520 .610 .710 .850 1.120 1.250 (e) Max.
Mean amount of clouds (overcast = 10) 4.6 5.0 4.4 4.4 3.6 4.3 4.1 4.3 5.4 5.3 5.6 6.0 4.6 Mean 4.5 5.7 5.3 5.6 5.7 5.8 4.5 6.5 5.8 5.2 5.2 5.1 5.3 Mean
Wind, mean velocity in miles per hour for month ... ... ... ... ... ... ... ... ... ... ... ... 7.6 Mean ... ... ... ... ... ... ... ... ... ... ... ... 7.6 Mean
Wind, greatest velocity in miles for 24 hours, ending at 10 a.m. ... ... ... ... ... ... 505 488 418 350 ... ... 520 (f) Max. 480 910 575 570 555 485 420 410 425 390 450 300 910 (f) Max.
Number of days it blew from each point..
N. 0 1 1 1 1 1 1 2 4 3 2 2 19 Total 1 0 0 0 1 0 1 0 0 0 0 1 4 Total
N.E. 10 1 6 3 6 1 2 4 3 10 6 7 73 " 13 7 3 7 3 4 9 12 10 14 7 16 105 "
E. 2 2 2 1 0 0 0 2 2 1 1 3 14 " 0 3 0 1 2 0 2 1 2 1 2 4 12 "
S.E. 2 0 0 1 0 0 0 0 2 4 3 7 17 " 5 4 4 2 1 0 2 4 1 1 4 1 38 "
S. 3 2 1 0 0 0 0 0 0 2 4 4 10 " 2 3 1 0 0 0 0 0 0 0 0 1 10 "
S.W. 4 5 8 9 5 4 3 6 4 3 4 7 61 " 4 7 9 5 6 16 11 8 10 6 13 4 99 "
W. 3 3 5 10 9 11 10 9 9 4 2 5 82 " 5 5 9 5 10 6 3 3 3 0 0 0 48 "
N.W. 2 3 2 6 7 4 5 5 5 2 4 5 58 " 0 0 2 2 3 3 0 1 2 2 2 2 33 "
Calm 0 0 1 0 0 0 0 0 0 0 0 0 5 " 0 0 0 0 0 0 0 0 0 0 0 0 4 "
Thunder occurred on (No. of days in month) 0 0 0 0 1 0 0 0 0 0 0 0 3 " 0 0 0 0 0 0 0 0 0 0 0 0 0 "
Snow or sleet fell on.. 0 0 0 0 0 0 0 0 0 0 0 0 0 " 0 0 0 0 0 0 0 0 0 0 0 0 0 "
Hail fell on.. 0 0 0 0 0 0 0 0 0 0 0 0 0 " 0 0 0 0 0 0 0 0 0 0 0 0 0 "
Fog prevailed on.. 0 2 0 0 2 0 0 3 1 6 0 6 20 " 0 0 2 0 5 1 2 1 2 2 2 2 24 "
Frosts occurred on.. 0 0 0 0 0 0 0 0 0 0 0 0 0 " 0 0 0 0 0 0 0 0 0 0 0 0 0 "
Number of days 31 28 31 30 31 30 31 31 30 31 30 31 365 ;; 31 29 31 30 31 30 31 31 30 31 30 31 366 "

NOTE.—The results are obtained from observations taken at 9.30 a.m., 3.30 p.m., and 9.30 p.m. each day. The self-registering instruments are read at 10 a.m., for 24 hours previous. The thermometers are compared periodically with a standard, and the index errors computed. The wind gauge used from the 1st August, 1863, is Dr. Robinson's cup and dial anemometer, which gives the velocity, and from it the pressure of the wind at any time; also the horizontal movement of the wind in miles in 24 hours.

The greatest pressure observed for the year was 30.581, on the 14th February, and the least, 28.901, on 19th November; the approximate range, therefore, for the year being 1.680.

(a) On 4th February.

(b) On 14th August.

(c) On 6th February and 9th March.

(d) On 15th June and 15th August.

(e) On 28th October.

(f) On 9th December, W.S.W., (for 5 months.)

The greatest pressure observed for the year was 30.609, on the 3rd June, and the least, 28.806, on 4th February; the approximate range, therefore, for the year being 1.803.

(a) On 10th February.

(b) On 31st July.

(c) On 1st January.

(d) On 31st July and 1st August.

(e) On 9th January.

(f) On 2nd February, W. and W.N.W.

RICHARD B. GORE, Observer,



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VUW Te Waharoa — PDF Otago Provincial Gazette 1866, No 411




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🎓 Results of Meteorological Observations in Dunedin, 1863-1864

🎓 Education, Culture & Science
Meteorology, Weather, Temperature, Rainfall, Wind, Dunedin, Otago, Statistics
  • Richard B. Gore, Observer