Average 60-65 mpg in summer? What do you get in winter?

I'm able to get 60 mpg in the summer without extreme effort. It takes a bit more effort to keep it above 50 mpg in the winter. This is mostly commuting in Massachusetts, where it was brutally cold last winter, and based on calculated MPG when filling up. The MPG displayed on the screen is usually 4 mpg or so more than actual.

I get my best mileage on the secondary roads where I'm able to use stealth to maintain speed on slight downhills. Winter is a triple whammy. Note only does it take more energy to roll the car on frozen tires, the battery doesn't absorb as much regen when it's cold, and the ICE runs a lot just to keep the car warm. This is my first winter with the scan gauge and I'm actually quite shocked at how low the coolant temperature is when the heater is running.

 

You could try rummaging around Fuelly for high MPG Gen3 entries and then "Chart all Fuelups"
(Is it rude to point to a stranger's info on Fuelly?) There's this 2012 from Ontario:
(Hmmm, Fuelly link isn't working - try searching Fuelly for "minglehill")
Looks like almost 15mpg hit (from 60+ highs to 45+ highs).
Not directly relevant, but with my C I lose about 10 mpg, but I travel alone (and cold) when it's possible.
(I'm so vain about my Fuelly numbers.)

 

I don't get 60-65 mpg (and most do not), but around 5 mpg drop in the winter is more the norm for me driving the same.

 

My first winter with a Prius here in Texas, and so far it's been a very mild one, but was shocked to see a nearly 10mpg drop when temps dipped into the 30s... Was averaging nearly 60mpg on my work commute, which dropped to under 50mpg (from the computer, so probably 5-10% less, actually) in the cold...makes me want to start blocking my grills once it gets even colder.

 

My shift is 55-56 in summer down to 49-50 during a Virginia winter, which is far milder than the Northeast USA or Canada.
(Someone had a beautiful graph of his monthly mpg averages showing the seasonal variations, but I can't locate it right now.)

 

I beat 60 mpg (indicated) one time "ever" and p-ssed off the entire world to get that. You obviously don't use the freeways to get to work. I too am in DFW and own a 2010 and 2015.

 

I primarily drive on Loop 12 to and from work, about 16 miles each way; when traffic gets heavy and there's a lot of stop and go driving, I tend to get the most MPG's with lots of coasting and trying to use as little braking as possible (leave a lot of space between those in front of me)...probably pisses off those behind me, but whatever

More downhills and easier going traffic going to work is when I average MPGs in the high 60s (computer), while going home is always a bit heavier traffic and more uphills leading to low-mid 50s, so avg is around 60mpgs (probably 56-57 actual) or so when temps are optimal.

 

I am in DFW also but I haven't had my Prius in the summer yet (just bought it in October). I don't think I'm willing to grill block here...I'd be pulling it off one day when it's 80 and putting it back on the next when it's 30 haha. But I have seen about a 3 mpg decrease since late November/December hit

 

When I was driving a Prius, I got about 57-59 mpg on average (according to the car computer) in the summer. I usually drove the speed limit, and did a lot of pulse and glide as well.

In winter, I got around 44-47 mpg. It averaged to about 57 mpg overall according to fuelly.

I was also driving a trim five, which has 17 inch wheels that sapped a few mpg as well. It probably cost me another 2-4 mpg.

 

Guess I need to watch some of these driving tip videos because I'm only getting like 48 mpg on average...

 

That is more on par with the norm...contrary to what some claim. Your doing fine.

 

61-63 in very mild weather. Summer 63-66.

Going fast down the interstate with a load maybe 47-49 MPG.

 

I find road choice has a lot to do with MPG. Ideal is a road with a 30-40 mph speed limit and gentle hills. Just driving a steady speed with traffic means you're pulsing to maintain speed up the hills and then coasting down the other side. It's like shooting fish in a barrel, especially in warm weather.

Steep hills and interstate speeds really hurt MPGs (Captain Obviously is in the building

 

One state over...on my 2011 Prius, I average low 50s during the summer and low 40s during the winter. It's about a 20% hit, which was roughly the same percentage drop for my old non-hybrids (Corolla and Accord).

 

Make what ever inference you like...but I own two. Not in normal city/freeway driving.

 

Here's a year's run, going July to July. Suprisingly little difference; it is somewhat erratic, our driving varies a lot. Several factors could contribute to the minimal drop in winter:

1. Switch from Michelin Pilot 215/45R17 to Michelin X-Ice2 195/65R15 every winter.
2. Use a block heater year 'round, and grill block through winter.
3. We're on the west coast, relatively mild winters.