Fall in zone 7bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 97049 (Rhododendron, OR)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Government Camp, OR (8 miles away).
- Average last spring frostMay 2750% chance of a 32°F freeze after this date
- Average first fall frostOct 950% chance of a 32°F freeze by this date
- Growing season (frost-free)134 daysmedian, 32°F threshold
- USDA hardiness zone7b5 to 10°F avg. coldest night
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This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
No soil station with a fresh reading within 62 miles.
4-inch depth
No soil station with a fresh reading within 62 miles.
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 97049 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
No soil reading near this ZIP. Typical extension timing for your region: spring March to April.
Fertilizer window
Lawn region: Pacific Northwest (west of the Cascades). Timing only; always follow the product label.
- Perennial ryegrass (cool-season): Early fall: September; Late fall: October–November; Overseeded Bermuda: Light feeding once the winter rye is established, if needed. Avoid: Summer feeding.
Plant now
No vegetable planting windows are open this week.
Prune now
No frost-timed pruning windows are open this week.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | May 4 |
| 50% (the "average" last frost) | May 27 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 14 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Sep 18 |
| 50% (the "average" first frost) | Oct 9 |
| 90% (late: most years have frozen by now) | Oct 26 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Jun 21 | Sep 16 |
| 32°F (freeze) | May 27 | Oct 9 |
| 28°F (hard freeze) | May 3 | Oct 28 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 97049
Dates count from your average last spring frost (May 27) and first fall frost (Oct 9). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Apr 1–15 | Jun 3–17 (transplant) | – |
| Pepper (sweet and hot) | Mar 18–Apr 1 | Jun 10–24 (transplant) | – |
| Eggplant | Mar 18–Apr 1 | Jun 10–24 (transplant) | – |
| Tomatillo | Apr 1–15 | Jun 3–17 (transplant) | – |
| Lettuce | Apr 1–15 | May 6–27 (transplant) Apr 29–Jun 10 (sow outdoors) | Aug 14–Sep 4 (transplant) Jul 31–Aug 28 (sowing) |
| Spinach | – | Apr 15–May 6 (sow outdoors) | Aug 14–Sep 4 (sowing) |
| Kale | Apr 1–15 | Apr 29–May 13 (transplant) Apr 29–May 13 (sow outdoors) | Jul 17–Aug 14 (transplant) Jul 3–31 (sowing) |
| Collards | Apr 1–15 | Apr 29–May 27 (transplant) Apr 29–May 27 (sow outdoors) | Jul 17–Aug 14 (transplant) Jul 3–31 (sowing) |
| Broccoli | Mar 18–Apr 1 | Apr 29–May 13 (transplant) | Jul 3–31 (transplant) |
| Cabbage | Mar 18–Apr 1 | Apr 29–May 13 (transplant) | Jul 3–31 (transplant) |
| Cauliflower | Mar 18–Apr 1 | May 13–27 (transplant) | Jul 3–31 (transplant) |
| Brussels sprouts | Mar 4–18 | Apr 29–May 13 (transplant) | Jun 19–Jul 10 (transplant) |
| Kohlrabi | Apr 1–15 | Apr 29–May 13 (transplant) Apr 29–May 13 (sow outdoors) | Jul 31–Aug 14 (sowing) |
| Bok choy / Asian greens | – | Apr 29–May 13 (sow outdoors) | Aug 14–28 (sowing) |
| Arugula | – | Apr 29–May 27 (sow outdoors) | Aug 14–Sep 11 (sowing) |
| Mustard greens | – | Apr 29–May 20 (sow outdoors) | Aug 14–28 (sowing) |
| Swiss chard | Apr 15–29 | May 13–Jun 3 (transplant) May 13–Jun 10 (sow outdoors) | Jul 31–Aug 14 (sowing) |
| Beet | – | Apr 29–May 27 (sow outdoors) | Jul 31–Aug 14 (sowing) |
| Carrot | – | May 6–Jun 3 (sow outdoors) | Jul 17–31 (sowing) |
| Radish | – | Apr 22–Jun 3 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Turnip | – | Apr 29–May 20 (sow outdoors) | Jul 31–Aug 14 (sowing) |
| Parsnip | – | May 6–27 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 1–29 (sow outdoors) | Jul 17–31 (sowing) |
| Onion (bulbing) | Mar 4–18 | Apr 15–29 (transplant) | – |
| Green onion / scallion | – | Apr 15–May 13 (sow outdoors) | Jul 31–Aug 14 (sowing) |
| Leek | Mar 4–18 | Apr 29–May 13 (transplant) | – |
| Garlic | – | – | Aug 28–Sep 25 (sowing) |
| Shallot | – | Apr 15–29 (transplant) | Aug 28–Sep 25 (sowing) |
| Potato | – | Apr 29–May 13 (transplant) | Jun 19–Jul 3 (transplant) |
| Sweet potato | – | Jun 17–Jul 1 (transplant) | – |
| Sweet corn | – | Jun 3–17 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 3–17 (sow outdoors) | – |
| Bean, pole | – | Jun 3–17 (sow outdoors) | – |
| Lima bean | – | Jun 10–24 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 17–Jul 8 (sow outdoors) | – |
| Cucumber | Apr 29–May 6 | Jun 3–17 (transplant) Jun 3–17 (sow outdoors) | – |
| Summer squash / zucchini | Apr 29–May 6 | Jun 3–17 (transplant) Jun 3–17 (sow outdoors) | – |
| Winter squash | Apr 29–May 6 | Jun 3–17 (transplant) Jun 3–17 (sow outdoors) | – |
| Pumpkin | – | Jun 3–17 (sow outdoors) | – |
| Watermelon | Apr 29–May 6 | Jun 10–24 (transplant) Jun 10–24 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 29–May 6 | Jun 10–24 (transplant) Jun 10–24 (sow outdoors) | – |
| Okra | Apr 15–29 | Jun 10–24 (transplant) Jun 10–24 (sow outdoors) | – |
| Celery | Mar 4–18 | Jun 3–10 (transplant) | – |
| Basil | Apr 15–29 | Jun 3–17 (transplant) Jun 3–17 (sow outdoors) | – |
| Cilantro | – | May 13–Jun 10 (sow outdoors) | Aug 14–28 (sowing) |
| Parsley | Mar 18–Apr 1 | May 13–27 (transplant) May 6–27 (sow outdoors) | – |
| Dill | – | May 27–Jun 10 (sow outdoors) | Aug 14–28 (sowing) |
| Sunflower | – | May 27–Jun 10 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 29–May 13 (transplant) | – |
| Rhubarb (crowns) | – | Apr 29–May 13 (transplant) | – |
| Strawberry (plants) | – | Apr 29–May 13 (transplant) | Jul 31–Aug 28 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Where these numbers come from
Station: Government Camp, OR (NOAA GHCN-Daily ID USC00353402), elevation 3,980 ft, 8.0 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Headworks Portland Wtr B, OR | 15 mi | Mar 27 | Nov 18 |
| Parkdale 1 NNE, OR | 18 mi | May 13 | Oct 3 |
| Bonneville Dam, OR | 19 mi | Mar 14 | Nov 27 |
The average last-frost dates of these stations span 75 days, a rough guide to local variation. See data sources & methods.
Frost questions for 97049
When is the last frost in 97049?
The average (50% chance) last spring freeze of 32°F for ZIP 97049 is May 27. For a more cautious planting date, use June 14, when only 1 year in 10 still sees a later freeze.
When is the first frost in 97049?
The average first fall freeze is October 9. In 1 year in 10 it comes by September 18.
What hardiness zone is 97049?
ZIP 97049 is in USDA zone 7b (5 to 10°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 97049 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
97028 Government Camp 97067 Mount Hood Villages 97011 Mount Hood Villages 97055 Sandy 97041 Mount Hood 97019 98639 North Bonneville 97014 Cascade Locks
Other ZIP codes in Clackamas County
97004 97009 97011 97013 97015 97017 97022 97023 97027 97028 97034 97035 97038 97042 97045 97055 97067 97068 97070 97086 97089 97222 97267 All Clackamas County frost dates · Oregon frost dates
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- Freeze alerts
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Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.