Portland, OR to Salt Lake City, UT: 986 miles in all, on 2 separate roads that share the number, 8 states, 312 numbered exits.
At 8 p.m. PDT, temperatures on I-84 run from 54°F near Pendleton to 80°F near Rufus, under mostly clear skies on average. Wind is light, gusting no higher than 15 mph anywhere on the road. No measurable rain is forecast on it in the next 24 hours.
Read from the National Weather Service’s NDFD forecast grid at 2.5 km, sampled every eight miles along the pavement (run 10/03 01Z). The page is rebuilt every hour.
| Where | State | Now | Sky | Next 24 hours |
|---|---|---|---|---|
| Mile 0 · Portland, ORExit 1 · Lloyd Center | OR | 70° | Mostly clear | Dry |
| Mile 30 · Gresham, ORExit 35 · Ainsworth State Park / Historic Columbia Riv | WA | 63° | Mostly clear | Dry |
| Mile 60 · Hood River, ORExit 63 · Hood River / City Center | WA | 67° | Mostly clear | Dry |
| Mile 90 · Wishram, WAExit 97 · Celilo Park / Deschutes State Park | OR | 73° | Clear | Dry |
| Mile 120 · Arlington, ORExit 129 · Blalock Canyon | WA | 74° | Clear | Dry |
| Mile 150 · Boardman, ORExit 159 · Tower Road | OR | 73° | Clear | Dry |
| Mile 180 · Hermiston, ORExit 188 · Stanfield / Hermiston | OR | 70° | Clear | Dry |
| Mile 210 · Pendleton, ORExit 224 · Poverty Flat Road / Old Emigrant Hill Road | OR | 61° | Clear | Dry |
| Mile 240 · La Grande, ORExit 252 · Starkey | OR | 62° | Clear | Dry |
| Mile 270 · North Powder, ORExit 285 · North Powder Haines | OR | 61° | Clear | Dry |
| Mile 300 · Baker City, ORExit 317 · Pleasant Valley | OR | 64° | Mostly clear | Dry |
| Mile 330 · Huntington, ORExit 345 · Huntington | OR | 69° | Clear | Dry |
| Mile 360 · Ontario, ORExit 3 · Fruitland / Payette | ID | 65° | Mostly clear | Dry |
| Mile 390 · Nampa, IDExit 33 · Karcher Road / Midland Boulevard | ID | 67° | Mostly clear | Dry |
| Mile 420 · Boise, IDExit 64 · Kuna / Blacks Creek Road | ID | 68° | Mostly clear | Dry |
| Mile 450 · Mountain Home, IDExit 90 · Mountain Home / Bruneau | ID | 70° | Partly cloudy | Dry |
| Mile 480 · Glenns Ferry, IDExit 121 · Glenns Ferry / King Hill | ID | 70° | Partly cloudy | Dry |
| Mile 510 · Wendell, IDExit 155 · Wendell / Hagerman | ID | 67° | Partly cloudy | Dry |
| Mile 540 · Twin Falls, IDExit 182 · Kimberly / Twin Falls | ID | 65° | Partly cloudy | Dry |
| Mile 570 · Rupert, IDExit 216 · Rupert / Declo | ID | 64° | Partly cloudy | Dry |
| Mile 600 · Malta, IDExit 245 · Malta / Sublett Road | ID | 64° | Mostly cloudy | Dry |
| Mile 630 · Snowville, UTExit 5 · Park Valley / Elko | UT | 64° | Partly cloudy | Dry |
| Mile 660 · Tremonton, UTExit 32 · Ranch Exit | UT | 64° | Partly cloudy | Dry |
| Mile 690 · Brigham City, UTExit 359 · Rest Area, Perry | UT | 71° | Partly cloudy | Dry |
| Mile 720 · Ogden, UTExit 92 · Mountain Green / Huntsville | UT | 63° | Partly cloudy | Dry |
| Mile 745 · Coalville, UTExit 120 · Salt Lake City | UT | 62° | Partly cloudy | Dry |
I-84 is not continuous: these miles follow its longest drivable run, and 217 more miles are signed in 1 separate piece.