Portland, Oregon1999 Climate Data
North America Region, US
Detailed temperature analysis for 1999 with 363 daily measurements across 12 months.
Avg: 53.7°F
12 Months
363 Records
Year Average
53.7°F
1999
Highest
76.4°F
Lowest
34.3°F
Range
42.1°F
Monthly Temperature Progression - 1999
32°F
42°F
Jan
44°F
Feb
45°F
Mar
50°F
Apr
54°F
May
60°F
Jun
66°F
Jul
68°F
Aug
64°F
Sep
55°F
Oct
50°F
Nov
44°F
Dec
Below Freezing
|32°F (0°C)|Above Freezing
Monthly Details - 1999
January 1999
Average:42.3°F
Range:35.1°F - 51.3°F
Days:29 days
Records:29
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February 1999
Average:43.7°F
Range:36.7°F - 52.8°F
Days:28 days
Records:28
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March 1999
Average:45.1°F
Range:38.0°F - 54.3°F
Days:31 days
Records:31
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April 1999
Average:50.2°F
Range:42.4°F - 63.3°F
Days:30 days
Records:30
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May 1999
Average:54.4°F
Range:45.2°F - 70.9°F
Days:31 days
Records:31
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June 1999
Average:60.2°F
Range:50.5°F - 73.0°F
Days:30 days
Records:30
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July 1999
Average:65.6°F
Range:56.2°F - 75.0°F
Days:31 days
Records:31
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August 1999
Average:67.9°F
Range:57.8°F - 73.9°F
Days:31 days
Records:31
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September 1999
Average:64.1°F
Range:52.5°F - 76.4°F
Days:30 days
Records:30
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October 1999
Average:55.0°F
Range:47.1°F - 61.4°F
Days:31 days
Records:31
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November 1999
Average:50.1°F
Range:43.3°F - 60.1°F
Days:30 days
Records:30
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December 1999
Average:43.9°F
Range:34.3°F - 52.0°F
Days:31 days
Records:31
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1999 Climate Summary
The year 1999 in Portland, Oregon, US was characterized by an average temperature of 53.7°F, with temperatures ranging from a low of 34.3°F to a high of 76.4°F.
Temperature Analysis
- Annual Average: 53.7°F
- Temperature Extremes: 42.1°F range
- Data Coverage: 12 months with available observations
- Total Measurements: 363 daily records
Seasonal Patterns
January42.3°F
February43.7°F
March45.1°F
April50.2°F
... and 8 more months