BWS Daily Climatology Written Summary

BWS Daily Climatology Table One

BWS Daily Climatology Table Two

BWS Daily Climatology Graphs

September 1 2016 to September 24 2016


(Compiled: Sunday, September 25, 2016 18:26)

Written Summary   Table One   Table Two   Graphs  
Notes:
1. Mean daily temperature and pressure are averaged from the standard 24 hourly observations and not as the average of the maximum and minimum values.
2. Precipitation day has = or >0.01". Trace amounts (< 0.01") are not included in data.
3. Departures from the normal are based on the 1971 to 2000 normals where available (with the exception of the Sea Surface Temperature, which is based on the 1985 to 2000 normal).
Notes:
1. Mean humidity is averaged from the standard 24 hourly observations.
2. Weather Notes indicate a specific condition was observed at least once that day.
3. Departures from the normal are based on the 1971 to 2000 normals where available (with the exception of the Sea Surface Temperature, which is based on the 1985 to 2000 normal).
Key:
PN = Precipitation, PC = Partly Cloudy, MC = Mostly Cloudy, OV = Overcast, DZ = Drizzle, SH = Showers, BS = Blowing Spray GR = Hail, FC = Funnel Cloud, HZ = Haze, RA = Rain, BR = Mist, TS = Thunder Storm/Shower
NOTE: To print graphs enable background printing in your browser print options.

Very warm and humid weather continuing with several thunderstorm days. Drier towards mid-month


Last edited: Sunday, September 25, 2016

September began with a low pressure centre passing to the distant north that brought mainly fair conditions with 9.8 hours of sunshine and a few isolated showers that produced 0.13" of rainfall. The high was 87F/30C with a low of 80F/26C. The 2nd was an unsettled day with heavy showers and thunderstorms. Winds gusted to 37 knots in association with one of the afternoon showers. There were 0.49" of rain and it was mostly cloudy with just 1.2 hours of sunshine. The temperature rose to 85F/29C and fell to 76F/24C. Saturday 3rd was dry, although there were some showers in the area throughout the day. There were 9.4 hours of sunshine, with a high of 87F/30C and a low of 82F/28C. Sunday 4th was largely fair. Despite a few showers in the vicinity, there was no rain and a modest 5 hours of sunshine. The high was 88F/31C and the low was 81F/27C. A trough from distant Post-Tropical Cyclone Hermine slowly passed through the area Monday 5th and Tuesday 6th, giving breezy conditions with occasional strong winds and a gust to 32 knots on the Tuesday. There were a few thunderstorms Monday morning through afternoon with 0.49" recorded. Monday's high was 87F/30C with a low of 77F/25C and 7.2 hours of sunshine. Thunderstorms were mainly in the morning hours of Tuesday with 0.70" recorded and a high of 84F/29C, a low of 73F/23C, and 4.4 hours of sunshine. A ridge of high pressure from the east brought settled and dry conditions on the 7th. The high was 86F/30C with a low of 80F/27C and 11 hours of sunshine. The 8th and 9th saw a weak ridge of high pressure influencing the area with an influx of moisture advecting across the region, bringing mainly fair conditions with 6.5 hours of sunshine on the 8th and 9.6 hours on the 9th. Showers and thunderstorms were observed in the area both days but no rain was recorded either day. The high on the 8th was 85F/29C with a low of 80F/26C. The 9th had high of 87F/30C with a low of 79F/26C. Saturday 10th was a mainly dry and sunny day, with only a trace of rain and 10.2 hours of sunshine. The maximum temperature rose to 88F/31C and the minimum fell to 80F/27C.
Sunday 11th was a very showery day with thunderstorms on and off throughout. There were 0.78" of precipitation recorded and only 3.6 hours of sunshine. The daytime maximum was 86F/30C and the minimum was 77F/25C. Despite thunderstorms in the vicinity, only a trace of rain was recorded on Monday 12th. There were 7.6 hours of sunshine; the high was 87F/30C and the low was 79F/26C. Tuesday 13th was mainly fair with 9.7 hours of sunshine, though a light shower produced 0.01" of rainfall. The high was 85F/30C and the low was 80F/27C. The 14th continued settled with plenty of sunshine, no rain and decreasing humidity levels. The high was 84F/29C with a low of 78F/26C and 9.4 hours of sunshine. Conditions remained fine and dry into the 15th as high pressure dominated and northeast breezes maintained the lower humidity. The high was 83F/28C with a low of 78F/25C and 10.3 hours of sunshine. The 16th saw weak high pressure hold in place, bringing more dry and mainly fair conditions with 3.6 hours of sun. The high was 83F/28C with a low of 77F/25C. Apart from an isolated shower which delivered 0.01" of rain and an occasional strong breeze, Saturday 17th was mainly fine with 10.4 hours of sunshine. The high was 86F/30C and the low was 77F/25C. The 18th was a mostly sunny day with 10.2 hours of sunshine. However, there were a few mainly light showers giving 0.03" of precipitation. The high was 85F/29C, the low 78F/25C. Monday the 19th saw showers in the vicinity throughout the day, however, only a trace of rainfall was recorded. There were 10 hours of sunshine recorded and the max temperature was 87F/30C with a min temperature of 79F/26C. The wind was moderate to strong at times with a gust of 22 knots recorded. Tuesday the 20th was mainly fair with 10.2 hours of sunshine. Evening showers and thunderstorms brought 0.61" of rain. The high was 85F/29C and the low was 75F/24C. Frequent showers and thunderstorms dominated Wednesday the 21st, delivering 1.63" of rain and barely allowing 0.8 hours of sunshine. The high struggled to 83F/28C while rain dropped the low to 74F/23C. Thursday the 22nd began with a few showers which produced 0.75" of rain. Subsidence ahead of approaching Tropical Storm Karl then produced fair weather and 7.5 hours of sunshine. The high was 86F/30C and the low was 74F/23C. On Friday the 23rd Tropical Storm Karl approached from the south. After 2.2 hours of sunshine early, showers and thunderstorms brought 0.82" of rain. The high was 84F/29C and the low was 76F/24C. The 24th saw Tropical Storm Karl pass to our near southeast during the morning. Karl brought cloudy conditions, showers, thunderstorms and tropical storm force winds with storm force gusts across Bermuda. There were 4.7 hours of sunshine and 3.89 of rainfall. Max winds recorded at the airport during T.S. Karls passage were 30 knots with gusts to 41 knots. The high was 84F/29C with a low of 75F/24C.


Produced by the Bermuda Weather Service
Unless otherwise stated, all statistical data are based on observations taken at the Bermuda International Airport.
 Mean Temp.
(°C/°F)
Max Temp.
(°C/°F)
Min Temp.
(°C/°F)
Daily Precip.
Inches
Accumulated Precip.
Inches
Year To Date Precip.
Inches
Sea Surface Temp.
(C/F)
Mean
Sea Level Pressure
" Hg / hPa
Total   10.34    
Mean27.7 / 81.829.6 / 85.325.4 / 77.6   29.6 / 85.230.08 / 1019.0
Departure
From Norm.
0.8 / 1.40.3 / 0.61.1 / 1.95.29  2.2 / 3.9 
Max29.0 / 84.231.2 / 88.2 3.89  29.9 / 85.830.20 / 1022.7
Min26.1 / 79.0 22.9 / 73.2   28.6 / 83.529.77 / 1008.1
 Mean Temp.
(°C/°F)
Max Temp.
(°C/°F)
Min Temp.
(°C/°F)
Daily Precip.
Inches
Accumulated Precip.
Inches
Year To Date Precip.
Inches
Sea Surface Temp.
(C/F)
Mean
Sea Level Pressure
" Hg / hPa
9/1/201628.8 / 83.930.3 / 86.526.4 / 79.50.130.1342.1729.9 / 85.830.03 / 1016.9
9/2/201628.0 / 82.429.2 / 84.624.2 / 75.60.490.6242.6629.9 / 85.830.05 / 1017.6
9/3/201628.7 / 83.630.3 / 86.527.5 / 81.50.000.6242.6629.9 / 85.830.11 / 1019.6
9/4/201628.7 / 83.831.2 / 88.227.3 / 81.10.000.6242.6629.9 / 85.830.06 / 1018.0
9/5/201627.8 / 82.130.3 / 86.524.7 / 76.50.491.1143.1529.9 / 85.830.10 / 1019.3
9/6/201627.3 / 81.128.8 / 83.822.9 / 73.20.701.8143.8529.9 / 85.830.19 / 1022.4
9/7/201627.9 / 82.229.8 / 85.626.6 / 79.90.001.8143.8529.9 / 85.830.19 / 1022.4
9/8/201627.6 / 81.729.3 / 84.726.4 / 79.50.001.8143.8529.9 / 85.830.13 / 1020.3
9/9/201628.4 / 83.130.4 / 86.726.2 / 79.20.001.8143.8529.9 / 85.830.15 / 1021.0
9/10/201629.0 / 84.230.9 / 87.626.5 / 79.70.001.8143.8529.9 / 85.830.20 / 1022.7
9/11/201627.4 / 81.330.2 / 86.425.2 / 77.40.782.5944.6329.9 / 85.830.17 / 1021.7
9/12/201628.2 / 82.730.4 / 86.726.0 / 78.80.002.5944.6329.9 / 85.830.11 / 1019.6
9/13/201627.9 / 82.229.6 / 85.326.8 / 80.20.012.6044.6429.9 / 85.830.09 / 1019.0
9/14/201627.0 / 80.728.8 / 83.825.7 / 78.30.002.6044.6429.5 / 85.130.07 / 1018.3
9/15/201626.6 / 79.928.4 / 83.125.3 / 77.50.002.6044.6429.5 / 85.130.07 / 1018.3
9/16/201626.6 / 79.928.4 / 83.125.2 / 77.40.002.6044.6429.5 / 85.130.10 / 1019.3
9/17/201627.1 / 80.929.8 / 85.625.1 / 77.20.012.6144.6529.5 / 85.130.13 / 1020.3
9/18/201627.5 / 81.429.4 / 84.925.3 / 77.50.032.6444.6829.5 / 85.130.08 / 1018.6
9/19/201628.1 / 82.530.4 / 86.726.3 / 79.30.002.6444.6829.1 / 84.430.06 / 1018.0
9/20/201627.4 / 81.329.4 / 84.923.9 / 75.00.613.2545.2929.1 / 84.430.07 / 1018.3
9/21/201626.1 / 79.028.2 / 82.823.2 / 73.81.634.8846.9229.1 / 84.430.08 / 1018.6
9/22/201627.5 / 81.529.8 / 85.623.3 / 73.90.755.6347.6729.1 / 84.430.06 / 1018.0
9/23/201627.3 / 81.129.0 / 84.224.3 / 75.70.826.4548.4928.6 / 83.529.89 / 1012.2
9/24/201626.9 / 80.428.6 / 83.524.1 / 75.43.8910.3452.3828.6 / 83.529.77 / 1008.1
 Hours Of
Sunshine
Mean
R.H.
%
Absolute
Max. R.H.
%
Absolute
Min. R.H.
%
Max Of
Mean Wind
knots / °
Peak
Wind
knots / °
Sky Conditions / Weather Notes
PN PC MC OV DZ SH RA GR TS FC HZ BS BR
Total174.5         
1317241101600110001
Mean7.375.085.264.7      
             
Departure
From Norm.
          
-2            
Max11.0 94.0 30  41  
             
Min0.8  49.0      
             
 Hours Of
Sunshine
Mean
R.H.
%
Absolute
Max. R.H.
%
Absolute
Min. R.H.
%
Max Of
Mean Wind
knots / °
Peak
Wind
knots / °
Sky Conditions / Weather Notes
PN PC MC OV DZ SH RA GR TS FC HZ BS BR
9/1/20169.872.8886421 / 25026 / 270
PNPCMCSH
9/2/20161.278.7936926 / 30037 / 300
PNMCOVSHTS
9/3/20169.479.5847115 / 30019 / 300
MC
9/4/2016575.8836118 / 25023 / 250
MCOV
9/5/20167.278.3876421 / 19027 / 200
PNPCMCOVSHTS
9/6/20164.478887124 / 17032 / 160
PNPCMCOVSHTS
9/7/20161174.682659 / 09013 / 070
PCMC
9/8/20166.57985718 / 07017 / 070
PCMCTS
9/9/20169.676.7866511 / 21013 / 210
PCMCTS
9/10/201610.273.7856014 / 21018 / 210
PCMCSH
9/11/20163.680.6886716 / 27019 / 240
PNPCMCSHTS
9/12/20167.676.4866811 / 22014 / 220
PCMCSHTS
9/13/20169.773.4826611 / 03017 / 050
PNPCMCSH
9/14/20169.466.3815712 / 05021 / 360
PCMC
9/15/201610.360.4685212 / 02017 / 360
PCMCOV
9/16/20163.661.9684910 / 06019 / 100
MCOV
9/17/201610.469.4816119 / 09025 / 120
PNPCMCSH
9/18/201610.273.8836816 / 10021 / 100
PNPCMCSH
9/19/20161074.2856515 / 14022 / 130
PCMCSH
9/20/201610.277.4926721 / 21026 / 180
PNPCMCOVSHTS
9/21/20160.884937223 / 23031 / 080
PNPCMCOVSHTS
9/22/20167.574.3916418 / 17023 / 170
PNMCOVSH
9/23/20162.280.5926926 / 15039 / 150
PNMCOVSHTS
9/24/20164.781.2946730 / 36041 / 360
PNMCOVSHTSBR