Weather in Helvetia, OR
Helvetia, Friday, 13 November, 13:20
Overcast. Feels like 51°. High 52°, low 48°.
Monthly outlook for Helvetia, OR: average high 49.2°, average low 42.1°. That is 0.1° below the climate normal for November. Precipitation is expected on 11 days (about 4.9 inches), against a normal of 9 days and 4.0 inches. The warmest day looks like 15 November (54.9°), the coolest 19 November (34.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 13 November – 22 November | 49.1° | 50.4° | -0.7° |
| 23 November – 2 December | 49.3° | 47.4° | +1.1° |
| 3 December – 12 December | at normal | 45.7° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Hillsboro (5 mi).
0.25
Helvetia, Saturday, 14 November
Rain. High 53°, low 46°.
0.36Helvetia, Sunday, 15 November
Rain. High 55°, low 44°.
0.02Helvetia, Monday, 16 November
Light rain. High 50°, low 40°.
0Helvetia, Tuesday, 17 November
Light rain. High 46°, low 38°.
0.11Helvetia, Wednesday, 18 November
Light rain. High 50°, low 38°.
0Helvetia, Thursday, 19 November
Overcast. High 46°, low 35°.
0
Helvetia, Friday, 20 November
Partly cloudy. High 49°, low 35°.
0.01Helvetia, Saturday, 21 November
Light rain. High 45°, low 42°.
0.13Helvetia, Sunday, 22 November
Light rain. High 44°, low 42°.
0.13Helvetia, Monday, 23 November
Light rain. High 49°, low 43°.
0.34Helvetia, Tuesday, 24 November
Rain. High 47°, low 42°.
0.56Helvetia, Wednesday, 25 November
Rain. High 48°, low 46°.
0.94Helvetia, Thursday, 26 November
Rain. High 53°, low 47°.
0.43Helvetia, Friday, 27 November
Rain. High 50°, low 45°.
0.97Helvetia, Saturday, 28 November
Rain. High 49°, low 42°.
0.19
Helvetia, Sunday, 29 November
Climate normal for this date — 60-year average.
0.27Helvetia, Monday, 30 November
Climate normal for this date — 60-year average.
0.26Helvetia, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.36Helvetia, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.3Helvetia, Thursday, 3 December
Climate normal for this date — 60-year average.
0.3Helvetia, Friday, 4 December
Climate normal for this date — 60-year average.
0.23Helvetia, Saturday, 5 December
Climate normal for this date — 60-year average.
0.28Helvetia, Sunday, 6 December
Climate normal for this date — 60-year average.
0.24Helvetia, Monday, 7 December
Climate normal for this date — 60-year average.
0.22Helvetia, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.31Helvetia, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.34Helvetia, Thursday, 10 December
Climate normal for this date — 60-year average.
0.31Helvetia, Friday, 11 December
Climate normal for this date — 60-year average.
0.28Helvetia, Saturday, 12 December
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Helvetia, OR are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Helvetia, OR since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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